Revert "HADOOP-16598. Backport "HADOOP-16558 [COMMON+HDFS] use protobuf-maven-plugin to generate protobuf classes" to all active branches" Wrong patch applied; missed jdk7 handling This reverts commit a36dbe6f354b0318c944177833f4952a9136ef58.
HADOOP-16598. Backport "HADOOP-16558 [COMMON+HDFS] use protobuf-maven-plugin to generate protobuf classes" to all active branches Reapply but this time with proper patch.