[tablet_server-test] cleaner exit-on-failure in TestStatus
[tablet_server-test] cleaner exit-on-failure in TestStatus

Updated the TestStatus scenario of the TabletServerTest to terminate
cleaner and faster in case of a failure when restarting tablet server.

Prior to this fix, when the mini tablet server fails to restart,
the test scenario would run indefinitely or until some higher-level
test framework terminates the tablet_server-test process.

As for the reason behind the failure on restart, the mini tablet
server might fail to restart if one the ports it tries to bind to
is used by another process.

Change-Id: I7c5efef9e579f6fd357357517c32a26440896967
Reviewed-on: http://gerrit.cloudera.org:8080/11506
Tested-by: Alexey Serbin <864f6b82bd94e8dda64141d4274519ee66e0102e@cloudera.com>
Reviewed-by: Adar Dembo <866ca730bfc7f544e3ebce604ceeba4879f23df0@cloudera.com>

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