[pgpool-committers: 4159] pgpool: Fix bug with memory leak tests and add new memory leak test.

[Tatsuo Ishii]

Fix bug with memory leak tests and add new memory leak test.

They did not correctly detect the memory leak.

Also add new memory leak test for extended query/query cache.

Branch
------
master

Details
-------
https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=7a47b01c3f011067e91124a7f984036d205240b2

Modified Files
--------------
src/test/regression/tests/060.memory_leak/test.sh  |  2 +-
.../tests/069.memory_leak_extended/test.sh         |  2 +-
.../070.memory_leak_extended_memqcache/test.sh     | 72 ++++++++++++++++++++++
3 files changed, 74 insertions(+), 2 deletions(-)