GTEST: fix mm/test_uct_mm.open_for_posix test to work well with valgrind
GTEST: fix mm/test_uct_mm.open_for_posix test to work well with valgrind

increase the progress time to make sure that the recv side's progress is
called to receive the message.

issue #1122

shssf/ucx,sergsagal1/ucx_rocm,shssf/ucx,shssf/ucx,sergsagal1/ucx_rocm,sergsagal1/ucx_rocm