ticket:8464: If LRUCache constructor fails, make sure destructor will still work.

git-svn-id: http://source.icu-project.org/repos/icu/icu@34673 251d0590-4201-4cf1-90de-194747b24ca1
ticket:8464: RelativeDateFormatter tests now passing for C++

git-svn-id: http://source.icu-project.org/repos/icu/icu@34674 251d0590-4201-4cf1-90de-194747b24ca1
ticket:9101: delete low-ROI tests that depended on the old rule parser and other deleted internals: cmsccoll/TestCollations, cmsccoll/RamsRulesTest, cmsccoll/TestRedundantRules (collationtest.txt), cmsccoll/TestExpansionSyntax (collationtest.txt), much of cmsccoll/TestVariableTopSetting (replaced by spot checks), citertst/TestCEs

git-svn-id: http://source.icu-project.org/repos/icu/icu@34675 251d0590-4201-4cf1-90de-194747b24ca1