8165687: Fix license and copyright headers in jd9 under hotspot/test
Summary: Legal notices and Oracle copyrights were updated (white and blank space, commas) in tests files for uniformity to meet Oracle requirements.
Reviewed-by: dholmes, iris
Contributed-by: Stanislav Smirnov <stanislav.smirnov@oracle.com>, Vassili Igouchkine <vassili.igouchkine@oracle.com>

8132919: Put compiler tests in packages
Reviewed-by: vlivanov, dpochepk
Contributed-by: igor.ignatyev@oracle.com

8149109: [TESTBUG] TestRegisterRestoring.java fails with "VM option 'SafepointALot' is develop"
Summary: Added missing -XX:+IgnoreUnrecognizedVMOptions.
Reviewed-by: vlivanov

8148490: RegisterSaver::restore_live_registers() fails to restore xmm registers on 32 bit
Summary: Fixed stack offsets for xmm register saving/restoring code on 32 bit.
Reviewed-by: kvn, mcberg