ACCUMULO-3073 Increase the timeout a bit more
ACCUMULO-3074 Increase the timeout for MergeIT#mergeTest
ACCUMULO-3076 Increase the timeout for SimpleBalancerFairnessIT
ACCUMULO-3075 Increase SSL IT timeouts across the board

Most of the tests copied the same timeout as the underlying
IT they call. This isn't realistic as running with SSL is
typically going to be more costly.
Merge branch '1.6.1-SNAPSHOT'