RFR: JDK-8281003 - MethodHandles::lookup throws NPE if caller is null

[Tim Prinzing]

JDK-8281003 - MethodHandles::lookup throws NPE if caller is null

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Commit messages:
 - Merge branch 'master' into JDK-8281003
 - Merge branch 'master' into JDK-8281003
 - removed commented out code
 - Moved null caller MethodHandles.lookup() test to a more reasonable location
 - JDK-8281003 - MethodHandles::lookup throws NPE if caller is null

Changes: https://git.openjdk.java.net/jdk/pull/7447/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7447&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8281003
  Stats: 88 lines in 4 files changed: 82 ins; 0 del; 6 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7447.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7447/head:pull/7447

PR: https://git.openjdk.java.net/jdk/pull/7447