Comment 7 for bug 1645092

Reviewed: https://review.opencontrail.org/26963
Committed: http://github.org/Juniper/contrail-generateDS/commit/76e64fd3204aff433ad2383258e65e62809ca41c
Submitter: Zuul (<email address hidden>)
Branch: master

commit 76e64fd3204aff433ad2383258e65e62809ca41c
Author: Prakash Bailkeri <email address hidden>
Date: Wed Dec 7 22:26:48 2016 +0530

Support attribute for xmpp messaging

Currently, XML for xmpp message doesn't support attribute declaration.

Example:
Mobility extended community needs two information. sequence number and sticky bit
In the current schema, this needs to be defined as two different element.
<xsd:element name="sequence-number" type="xsd:integer"/>
<xsd:element name="sticky" type="xsd:integer"/>

This will add two xml nodes to xmpp message making it more verbose and bulky
<xmpp-message>
<sequence-number> 1 </sequence-number>
<sticky> False </sticky>
</xmpp-message>

This xmpp message can be represented with one XML node with attributes.
<xmpp-message>
<mobility seqno="2" sticky="true" />
</xmpp-message>

Add support for XML attribute in schema and auto generation of types/parser code

Change-Id: Idbd238ec414f7b18c897c8482cfdff04c0f77876
Related-bug: #1645092