[Bugs] [Bug 1295762] New: The --xml flag should always output xml

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1295762

            Bug ID: 1295762
           Summary: The --xml flag should always output xml
           Product: GlusterFS
           Version: mainline
         Component: cli
          Keywords: Triaged
          Severity: low
          Assignee: bugs at gluster.org
          Reporter: ndevos at redhat.com
                CC: asengupt at redhat.com, bugs at gluster.org,
                    ggarg at redhat.com, gluster-bugs at redhat.com,
                    hgowtham at redhat.com
            Blocks: 1294547



+++ This bug was initially created as a clone of Bug #1294547 +++
+++                                                           +++
+++ Use this bug to post a fix in the master branch.          +++

The output of the cli with the --xml flag is inconsistent. Every cli command
should output xml if that flag is set.

At the very minimum, a valid xml message could just be the string output
wrapped in xml, ie.:

# gluster --xml --version
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<cliOutput>
  <opRet>0</opRet>
  <opRetStr>glusterfs 3.7.6 built on Dec 11 2015 22:26:22
Repository revision: git://git.gluster.com/glusterfs.git
Copyright (c) 2006-2011 Gluster Inc. <http://www.gluster.com>
GlusterFS comes with ABSOLUTELY NO WARRANTY.
You may redistribute copies of GlusterFS under the terms of the GNU General
Public License.</opRetStr>
</cliOutput>

This would allow an application to rely on sane input that can always be dom
processed.


Referenced Bugs:

https://bugzilla.redhat.com/show_bug.cgi?id=1294547
[Bug 1294547] The --xml flag should always output xml
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