Convert some tests to new config API and use only one segment by default in REPL mode
ISPN-2772 WIP
Remove unused REPL interceptors
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
ISPN-3133 AsyncAPINonTxSyncDistTest and AsyncAPINonTxAsyncDistTest are mistakenly executed in REPL mode

* In non-tx mode the primary owner will skip the replication of unsuccessfull conditional commands
* In non-tx mode the originator will always wait for the primary owner's return value regardless if command is async if reliable return values are required
* Fix AsyncAPINonTxSyncReplTest by allowing the key to serialize if the operation required forwarding (originator not primary owner)
Convert some tests to use spies instead of mocks to avoid some very brittle code that was broken by fixing ISPN-3133