Enable the Java rendering test for OpenGL2 too

This change ensures the rendering test for Java is enabled for both
the OpenGL and OpenGL2 backends. Also use the word rendering in the
test name to make it a little more obvious what it does.

Change-Id: I770842a8d91db95623e5cd0ab2629ea1fee9c888
Merge topic 'java-rendering-test' into master

b1ec6058 Enable the Java rendering test for OpenGL2 too