TST: test reset_index with tuple index name and col_level!=0
 - [x] tests added / passed
 - [x] passes ``git diff master --name-only -- '*.py' | flake8 --diff``

This just completes #16165 as [asked](https://github.com/pandas-dev/pandas/pull/16165#issuecomment-298427315) by @jorisvandenbossche 
# [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/16195?src=pr&el=h1) Report
> Merging [#16195](https://codecov.io/gh/pandas-dev/pandas/pull/16195?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/217864e3902592b9723a1070f1bbbb203a1759f4?src=pr&el=desc) will **not change** coverage.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/16195/graphs/tree.svg?width=650&height=150&src=pr&token=eZ4WkYLtcO)](https://codecov.io/gh/pandas-dev/pandas/pull/16195?src=pr&el=tree)

```diff
@@           Coverage Diff           @@
##           master   #16195   +/-   ##
=======================================
  Coverage   90.86%   90.86%           
=======================================
  Files         162      162           
  Lines       50862    50862           
=======================================
  Hits        46215    46215           
  Misses       4647     4647
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `88.64% <ø> (ø)` | :arrow_up: |
| #single | `40.3% <ø> (ø)` | :arrow_up: |


------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/16195?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/16195?src=pr&el=footer). Last update [217864e...1fb57b9](https://codecov.io/gh/pandas-dev/pandas/pull/16195?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 # [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/16195?src=pr&el=h1) Report
> Merging [#16195](https://codecov.io/gh/pandas-dev/pandas/pull/16195?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/217864e3902592b9723a1070f1bbbb203a1759f4?src=pr&el=desc) will **not change** coverage.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/16195/graphs/tree.svg?token=eZ4WkYLtcO&src=pr&width=650&height=150)](https://codecov.io/gh/pandas-dev/pandas/pull/16195?src=pr&el=tree)

```diff
@@           Coverage Diff           @@
##           master   #16195   +/-   ##
=======================================
  Coverage   90.86%   90.86%           
=======================================
  Files         162      162           
  Lines       50862    50862           
=======================================
  Hits        46215    46215           
  Misses       4647     4647
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `88.64% <ø> (ø)` | :arrow_up: |
| #single | `40.3% <ø> (ø)` | :arrow_up: |


------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/16195?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/16195?src=pr&el=footer). Last update [217864e...1fb57b9](https://codecov.io/gh/pandas-dev/pandas/pull/16195?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 # [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/16195?src=pr&el=h1) Report
> Merging [#16195](https://codecov.io/gh/pandas-dev/pandas/pull/16195?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/217864e3902592b9723a1070f1bbbb203a1759f4?src=pr&el=desc) will **not change** coverage.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/16195/graphs/tree.svg?width=650&height=150&src=pr&token=eZ4WkYLtcO)](https://codecov.io/gh/pandas-dev/pandas/pull/16195?src=pr&el=tree)

```diff
@@           Coverage Diff           @@
##           master   #16195   +/-   ##
=======================================
  Coverage   90.86%   90.86%           
=======================================
  Files         162      162           
  Lines       50862    50862           
=======================================
  Hits        46215    46215           
  Misses       4647     4647
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `88.64% <ø> (ø)` | :arrow_up: |
| #single | `40.3% <ø> (ø)` | :arrow_up: |


------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/16195?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/16195?src=pr&el=footer). Last update [217864e...1fb57b9](https://codecov.io/gh/pandas-dev/pandas/pull/16195?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 thanks!