gbp: More reliable unit-tests

gbp: More reliable unit-tests

Type: fix

the GBP unit tests would peridocially fail. The reason being that there
is dynamic state whose presence nneds to be created, tested and then
timeed out. The failures occurded when the timeout occured before the
state could be tested. the previous timeout was 2 seconds, this has been
doubled, as a result i saw no faliures running continuously for ~16
hours.
bumping the timer increasing the test run time from ~40 to ~53 seconds,
a small price to pay.

in test cases where the state is not timed out i bumped the timer to 60
seconds.

Signed-off-by: Neale Ranns <nranns@cisco.com>
Change-Id: I11b0970570caa8eebf486fe8cd8e44a4b2b1fc36