8181917: Refactor UL LogStreams to avoid using resource area
Reviewed-by: ehelin, mlarsson

8181449: Fix debug.hpp / globalDefinitions.hpp dependency inversion
Summary: Refactor debug.hpp and reverse include dependency.
Reviewed-by: coleenp, stefank, dcubed

8172098: A lot of gtests uses TEST instead of TEST_VM
Reviewed-by: iignatyev

8146009: "pure virtual method called" with using new GC logging mechanism
Reviewed-by: dsamersoff, dholmes, mchernov
Contributed-by: marcus.larsson@oracle.com, michail.chernov@oracle.com

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>

8165600: Convert internal logging tests to GTest
Reviewed-by: rehn, rprotacio

8166925: several native TESTs should be changed to TEST_VM
Reviewed-by: vlivanov, kzhaldyb

8157948: UL allows same log file with multiple file=
Reviewed-by: dholmes, rehn

8150823: UL disables log outputs incorrectly
Reviewed-by: rehn, sla

8150894: Unused -Xlog tag sequences are silently ignored.
Reviewed-by: rehn, sla

8061219: Implement unit-tests for UL
Reviewed-by: coleenp, mockner, rprotacio