title: Gcloud sql instances create error with --database-version=MYSQL_5_7
body: <p>How to create a MySQL 5.7 cloud sql instance with the gcloud utility?</p>
  
  <p>I can create a 5.7 instance using the GCloud (web) console on my project but tt doesn't work when I use the gcloud cli command using the dedicated option : " --database-version=MYSQL_5_7"
  (it's OK with the value MYSQL_5_6 that is also the default)</p>
  
  <pre><code>gcloud sql instances create test57euw1b --tier=D0 --database-version=MYSQL_5_7 --gce-zone=europe-west1-b
  ERROR: (gcloud.beta.sql.instances.create) HTTPError 400: Invalid instance property.
  </code></pre>
  
  <p>I'm running on Ubuntu 1.16.04 ad here my Gcloud CLI version :
  $ gcloud --version
  Google Cloud SDK 165.0.0
  alpha 2017.03.24
  beta 2017.03.24
  bq 2.0.25
  core 2017.07.28
  gcloud 
  gsutil 4.27
  kubectl </p>
  
  <p>The same happens usin "beta":
  gcloud beta sql instances create test5757 --tier=D0 --database-version=MYSQL_5_7 --gce-zone=europe-west1-b</p>
  
  <p>I'd like to be able to create a 5.7 instance with gcloud to script it.</p>