RFR: 8267505: {List, Set, Map}PropertyBase::bind should check against identity

[Jose Pereda]

ListPropertyBase::bind, SetPropertyBase::bind, MapPropertyBase::bind have a check on whether a different instance of the observable is the same, and this PR changes that to check against identity.

Tests are included.

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Commit messages:
 - Check against identity when binding List, Map, Set PropertyBase, and include tests

Changes: https://git.openjdk.java.net/jfx/pull/516/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jfx&pr=516&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8267505
  Stats: 110 lines in 6 files changed: 107 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jfx/pull/516.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/516/head:pull/516

PR: https://git.openjdk.java.net/jfx/pull/516