maven-compiler-plugin uses 1.7. plugin versions inside <pluginManagement> in parent pom
First running build after switch to jdk 7
Remove debug code. Step back from GWT 2.5.1 to 2.5.0
Switch to java7
Restored source path references of processor plugin
Switch to java7 with processor plugin 2.0.7.2-redhat
Working java7 switch with processor plugin 2.1.1
Working java7 switch with processor plugin 2.1.1 (removed custom attributes)
Finally successful switch to java7
Switch to java7