Fix unit test infrastructure to read testData from plugin

Even though the Android plugin is sitting outside of the
regular IDEA plugin tree, the unit tests were reading
testData from the old plugin's testData rather than the
new Android plugin's testData directory.

Change-Id: I95421a49daafcc5e8e821e5d6f55a7a2043c5688
3 files changed
tree: 369345b1e06786abd3d027d7f67cc19a16ba3fb7
  1. adt-branding/
  2. android/
  3. android-designer/
  4. .gitignore