OPexpect: Fix timeout failures in some cases
OPexpect: Fix timeout failures in some cases

There are some cases, timeout for expect function become non
functional due to timeout given in spawn init. For now we have
removed the default timeout from spawn init. We may need to
revert this patch once we have understand root cause or fix
for it.

Signed-off-by: Pridhiviraj Paidipeddi <fd8ea14509c256cbd04eaa4ee745a213945e70a1@linux.vnet.ibm.com>

open-power/op-test-framework,open-power/op-test-framework,open-power/op-test-framework