Revert "Fixed random SlaveRecoveryTest.PingTimeoutDuringRecovery test failure."
Revert "Fixed random SlaveRecoveryTest.PingTimeoutDuringRecovery test failure."

This reverts commit 57088b11a328355b7f2a53a1b3fba9928a2fde73.

dforsyth/mesos,dforsyth/mesos,dforsyth/mesos,dforsyth/mesos,dforsyth/mesos,dforsyth/mesos,dforsyth/mesos