EndpointSlices and Endpoints usually become ready pretty fast, but the
test always waited 5s before performing every check and it performed the
check 4 times in total, so unnecessarily extends the test 20s.
The commit changes the poll function to perform a check before waiting,
and reduces the interval to 2 seconds to align with other EndpointSlice
tests. It reduces the test duration from 30s to 4s.
Signed-off-by: Quan Tian <qtian@vmware.com>
afefc6f4eb