Change Java source file version to 1.6 to make use of annotations and to fix api restriction errors
Change Java source file version to 1.6 to make use of annotations and to fix api restriction errors

tlaplus/tlaplus,tlaplus/tlaplus,lemmy/tlaplus,tlaplus/tlaplus,tlaplus/tlaplus,lemmy/tlaplus,lemmy/tlaplus,lemmy/tlaplus