This reverts commit 15162ce33a.
Mesos services were not working, so reverted the patch
which renamed slave to agent.
Change-Id: I94a9a36e649f48f8e31386226226261ef459ce25
Closes-Bug: #1617407
Mesos community has renamed slave to agent. This change reflect
this renaming in the code.
Change-Id: Ic97a827345b62f812ed63180cd1f5820e2200682
Closes-Bug: #1516188