Remove unused imports
CH cleanup
ISPN-2772 New REPL CH

Fix some of the total order tests.
ISPN-2772 fix BaseReplicatedAPITest

Test was asserting wrong behaviour, specific to old REPL mode. The new REPL mode resets putIfAbsent on commands sent to remote owners if the command executed successfully on originator. This forces them to apply the update unconditionally.
wip
Convert some tests to new config API and use only one segment by default in REPL mode
ISPN-2772 WIP
Remove unused REPL interceptors
ISPN-3133 AsyncAPINonTxSyncDistTest and AsyncAPINonTxAsyncDistTest are mistakenly executed in REPL mode

TODO details!
Remove SEQUENCER JGroups protocol as it is no longer used

Also remove the garbage character from last line of core/src/test/resources/stacks/tcp_mping/tcp1.xml