Sometimes, 100ms isn't enough for the RPC call to reach
the server, and therefore the request times out before
it invokes the mock.

Increased the timeout to 1 second, and tested this
in CI for more than 1,000 iterations in
a custom CR: https://gerrit.hyperledger.org/r/#/c/28258/



Change-Id: I01976373dcb66f652016f8916c5c86027e21f0d4
Signed-off-by: yacovm <yacovm@il.ibm.com>