RFR: 7080150: [TEST_BUG][macosx] No mac os x EmbeddedFrame support in regression regtesthelpers

[Alisen Chung]

added EmbeddedFrame support for macosx in regtesthelpers

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Commit messages:
 - Merge branch 'master' into 7080150
 - removed from ProblemList.txt
 - added macos EmbeddedFrame support to AWT regtesthelpers

Changes: https://git.openjdk.java.net/jdk/pull/8348/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8348&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-7080150
  Stats: 7 lines in 2 files changed: 6 ins; 1 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8348.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8348/head:pull/8348

PR: https://git.openjdk.java.net/jdk/pull/8348