Correct the self usage in ThreePhaseCommitCohort
Seems this correction missed from another commit

Change-Id: Iacd8055b0e59238cf3377f250de0f0e17f4e3e98
Signed-off-by: Basheeruddin Ahmed <syedbahm@cisco.com>
Merge "Correct the self usage in ThreePhaseCommitCohort Seems this correction missed from another commit"