regression test only setmocktime RPC call
RPC tests: create initial chain with specific timestamps

Use setmocktime to create the initial block chain with
10-minute-apart-blocks starting 1 Jan 2014.
travis: disable rpc tests for windows until they're not so flaky
Merge pull request #5280

3c30f27 travis: disable rpc tests for windows until they're not so flaky (Cory Fields)
daf03e7 RPC tests: create initial chain with specific timestamps (Gavin Andresen)
a8b2ce5 regression test only setmocktime RPC call (Gavin Andresen)