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/dependencies/chart/TEST_CONFIG_ipv4=1_ipv6=0_dhcp=1_routers=0.chart b/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/chart/TEST_CONFIG_ipv4=1_ipv6=0_dhcp=1_routers=0.chart
new file mode 100644
index 0000000..ea0672c
--- /dev/null
+++ b/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/chart/TEST_CONFIG_ipv4=1_ipv6=0_dhcp=1_routers=0.chart
@@ -0,0 +1,4 @@
+{
+  "ipv4": {"expect": "True",
+    "hosts":["h1v4", "h2v4" ,"h3v4", "h4v4", "h5v4", "h6v4", "h7v4", "h8v4", "h9v4", "h10v4", "h11v4" ,"h12v4" ,"h13v4"]}
+}