tests: Use longer timeout in p2p_go_neg_auth_result()

tests: Use longer timeout in p2p_go_neg_auth_result()

It is possible for the P2P-GROUP-STARTED event to get delayed more than
one second especially when the GO Negotiation responder becomes the P2P
Client and the system is heavily loaded. Increase the default timeout
for the expected success case from 1 to 5 seconds to avoid failing test
cases that would have succeeded if given a bit more time to complete the
exchange.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>