Change the test script directory name to fix some make dist error.

diff --git a/src/test/regression/tests/012.watchdoc_test_failover_when_quorum_exists/master.conf b/src/test/regression/tests/012.watchdog_failover_when_quorum_exists/master.conf
similarity index 100%
rename from src/test/regression/tests/012.watchdoc_test_failover_when_quorum_exists/master.conf
rename to src/test/regression/tests/012.watchdog_failover_when_quorum_exists/master.conf

diff --git a/src/test/regression/tests/012.watchdoc_test_failover_when_quorum_exists/standby.conf b/src/test/regression/tests/012.watchdog_failover_when_quorum_exists/standby.conf
similarity index 100%
rename from src/test/regression/tests/012.watchdoc_test_failover_when_quorum_exists/standby.conf
rename to src/test/regression/tests/012.watchdog_failover_when_quorum_exists/standby.conf

diff --git a/src/test/regression/tests/012.watchdoc_test_failover_when_quorum_exists/standby2.conf b/src/test/regression/tests/012.watchdog_failover_when_quorum_exists/standby2.conf
similarity index 100%
rename from src/test/regression/tests/012.watchdoc_test_failover_when_quorum_exists/standby2.conf
rename to src/test/regression/tests/012.watchdog_failover_when_quorum_exists/standby2.conf

diff --git a/src/test/regression/tests/012.watchdoc_test_failover_when_quorum_exists/test.sh b/src/test/regression/tests/012.watchdog_failover_when_quorum_exists/test.sh
similarity index 100%
rename from src/test/regression/tests/012.watchdoc_test_failover_when_quorum_exists/test.sh
rename to src/test/regression/tests/012.watchdog_failover_when_quorum_exists/test.sh