updated build.gradle to use gradle.properties from main module like build tool version to prevent future toll dependency issue
CA-889 removes unused test
Merge remote-tracking branch 'origin/develop'

Conflicts:
	facebook/TestApp/build.gradle
	facebook/TestApp/project.properties
	facebook/build.gradle
	facebook/tests/AndroidManifest.xml
	facebook/tests/build.gradle
	facebook/tests/project.properties
	facebook/tests/res/values/strings.xml
	facebook/tests/src/com/facebook/AccessTokenTests.java
	facebook/tests/src/com/facebook/AppEventsLoggerTests.java
	facebook/tests/src/com/facebook/AsyncRequestTests.java
	facebook/tests/src/com/facebook/AuthorizationClientTests.java
	facebook/tests/src/com/facebook/BatchRequestTests.java
	facebook/tests/src/com/facebook/FacebookActivityTestCase.java
	facebook/tests/src/com/facebook/GraphRequestTests.java
	facebook/tests/src/com/facebook/RequestTests.java
	facebook/tests/src/com/facebook/SessionTests.java
	facebook/tests/src/com/facebook/SettingsTests.java
	facebook/tests/src/com/facebook/SharedPreferencesTokenCacheTests.java
	facebook/tests/src/com/facebook/TestSessionTests.java
	facebook/tests/src/com/facebook/internal/ImageResponseCacheTests.java