title: Keyword 'AppiumLibrary.Open Application' expected 1 to 2 non-keyword arguments
body: <p>I use robotframework-appiumlibrary 1.2.5 </p>
  
  <pre><code>==============================================================================
  Open App                                                              | FAIL |
  Keyword 'AppiumLibrary.Open Application' expected 1 to 2 non-keyword arguments,
  got 5.
  ------------------------------------------------------------------------------
  </code></pre>
  
  <p>Test Script:</p>
  
  <pre><code>*** Settings ***
  Library           AppiumLibrary
  
  *** Variables ***
  ${REMOTE_URL}     http://localhost:4723/wd/hub
  ${PLATFORM_NAME}    Android
  ${PLATFORM_VERSION}    4.4.2
  ${DEVICE_NAME}    emulator-5554
  ${APP}            D:/asas.apk
  
  *** Test Cases ***
  Open App
      Open Application    ${REMOTE_URL}    ${PLATFORM_NAME}    ${PLATFORM_VERSION}    ${DEVICE_NAME}    ${APP}
      Sleep   10s 
  </code></pre>
  
  <p>I want to know solution.</p>