Support for H-AGG topologies in SRRouting tests.

Added hagg_fabric.py which implements the H-AGG topology in
Mininet. Also changed the SRRouting tests to use that topology and
updated all json/chart/conf files. We still need to update failure
files. I run tests 1-9 with the updated topology and they all passed.

Further removed all comcast references and added the labels for the
switches.

Change-Id: Iea813d8cdee77580a7ba62a58ad481a11912a62b
diff --git a/TestON/tests/USECASE/SegmentRouting/SRRouting/SRRouting.params b/TestON/tests/USECASE/SegmentRouting/SRRouting/SRRouting.params
index 947666d..1b6aec0 100644
--- a/TestON/tests/USECASE/SegmentRouting/SRRouting/SRRouting.params
+++ b/TestON/tests/USECASE/SegmentRouting/SRRouting/SRRouting.params
@@ -14,7 +14,7 @@
     <DEPENDENCY>
         <useCommonConf>False</useCommonConf>
         <useCommonTopo>True</useCommonTopo>
-        <topology>comcast_fabric.py</topology>
+        <topology>hagg_fabric.py</topology>
         <lib>routinglib.py,trellislib.py,trellis_fabric.py</lib>
         <conf>bgpdbgp1.conf,bgpdbgp2.conf,bgpdr1.conf,bgpdr2.conf,dhcpd6.conf,dhcpd.conf,zebradbgp1.conf,zebradbgp2.conf</conf>
     </DEPENDENCY>