[master] RFR: Fix BasicLock to test for UseObjectMonitorTable rather than LM_LIGHTWEIGHT [v3]

[Coleen Phillimore]

> The test compiler/uncommontrap/TestDeoptOOM.java was failing with -Xcomp because it was looking for the object monitor in the basicLock which is only the case for -XX:+UseObjectMonitorTable.
> 
> Testing tier1 locally with table on and off.

Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:

  And another place where we clear_object_monitor_cache if not using the OM table.

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Changes:
  - all: https://git.openjdk.org/lilliput/pull/182/files
  - new: https://git.openjdk.org/lilliput/pull/182/files/d6146342..bc38a820

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=lilliput&pr=182&range=02
 - incr: https://webrevs.openjdk.org/?repo=lilliput&pr=182&range=01-02

  Stats: 8 lines in 1 file changed: 0 ins; 6 del; 2 mod
  Patch: https://git.openjdk.org/lilliput/pull/182.diff
  Fetch: git fetch https://git.openjdk.org/lilliput.git pull/182/head:pull/182

PR: https://git.openjdk.org/lilliput/pull/182