Single node cluster comes up as red with local gateway

[nirvdrum]

When bringing up a single node cluster using the local gateway with a configuration similar to the following:

gateway:
  type: local
  recover_after_nodes: 1
  recover_after_time: 5m
  expected_nodes: 1

ES 0.15.0 will wait the full 5 min. before starting up. In ES 0.14.4 it would come up right away.

[kimchy]

Single node cluster comes up as red with local gateway, closed by 1a48007.