[pgpool-committers: 4619] pgpool: Add wait_for_failover_done function for test.

[Bo Peng]

Add wait_for_failover_done function for test.

Branch
------
V3_4_STABLE

Details
-------
https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=4da7d45e1c77c2eef527399612c8f6fa52c7cfef

Modified Files
--------------
src/test/regression/libs.sh                    | 21 +++++++++++++++++++++
src/test/regression/tests/003.failover/test.sh |  2 +-
2 files changed, 22 insertions(+), 1 deletion(-)