+++ This bug was initially created as a clone of Bug #1332219 +++

Description of problem:
rearrange the code, to add some defence functionality for
pthread_create(), i.e. only on a success on pthread_create() call
pthread_join().

Version-Release number of selected component (if applicable):
3.1



COMMIT: http://review.gluster.org/14152 committed in master by Dan Lambright (dlambrig) 
------
commit f7d9814dc16d3a0e1468e7946a9e185cc76246df
Author: Prasanna Kumar Kalever <prasanna.kalever>
Date:   Mon May 2 19:38:55 2016 +0530

    tier: avoid pthread_join if pthread_create fails
    
    this patch rearrange the code, to add some defence functionality for
    pthread_create(), i.e. only on a success on pthread_create() call
    pthread_join().
    
    Change-Id: I0836bc950a210574cfdc755a666c6ac5df6ab430
    BUG: 1332219
    Signed-off-by: Prasanna Kumar Kalever <prasanna.kalever>
    Reviewed-on: http://review.gluster.org/14152
    Tested-by: Prasanna Kumar Kalever <pkalever>
    NetBSD-regression: NetBSD Build System <jenkins.org>
    CentOS-regression: Gluster Build System <jenkins.com>
    Smoke: Gluster Build System <jenkins.com>
    Reviewed-by: Joseph Fernandes
    Reviewed-by: Dan Lambright <dlambrig>