ipv4/ipv6 w/t dhcp support and routers.

Introducing ipv4/ipv6 with dhcp support. Note here
that tests might fail from time to time, this needs further
investigation. Further, introducing external routing support
for ipv4.

Change-Id: I64450f4082e47b835ae2e967a98a36fe69a059c3
diff --git a/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/json/COMCAST_CONFIG_ipv4=0_ipv6=1_dhcp=0_routers=0.json b/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/json/COMCAST_CONFIG_ipv4=0_ipv6=1_dhcp=0_routers=0.json
index da381ab..52624f7 100644
--- a/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/json/COMCAST_CONFIG_ipv4=0_ipv6=1_dhcp=0_routers=0.json
+++ b/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/json/COMCAST_CONFIG_ipv4=0_ipv6=1_dhcp=0_routers=0.json
@@ -122,67 +122,67 @@
         } 
     },
     "hosts" : { 
- 	"00:aa:00:00:00:01/None" : {
+ 	"00:bb:00:00:00:01/None" : {
 		"basic": {
 			"locations": ["of:0000000000000001/3"],
 			"ips": ["1000::3fe"]
 		     }
 	    },
-	"00:aa:00:00:01:01/None" : {
+	"00:bb:00:00:01:01/None" : {
 		"basic": {
 			"locations": ["of:0000000000000001/4"],
 			"ips": ["1001::3fe"]
 		     }
 	    },
-	"00:aa:00:00:00:02/None" : {
+	"00:bb:00:00:00:02/None" : {
 		"basic": {
 			"locations": ["of:0000000000000002/6"],
 			"ips": ["1002::3fe"]
 		     }
 	    },
-	"00:aa:00:00:00:03/None" : {
+	"00:bb:00:00:00:03/None" : {
 		"basic": {
 			"locations": ["of:0000000000000002/7", "of:0000000000000003/6"],
 			"ips": ["1003::3fe"]
 		     }
 	    },
-	"00:aa:00:00:00:04/30" : {
+	"00:bb:00:00:00:04/30" : {
 		"basic": {
 			"locations": ["of:0000000000000003/7","of:0000000000000002/8"],
 			"ips": ["1004::3fe"]
 		     }
 	    },
-	"00:aa:00:00:00:05/20" : {
+	"00:bb:00:00:00:05/20" : {
 		"basic": {
 			"locations": ["of:0000000000000003/8"],
 			"ips": ["1005::3fe"]
 		     }
 	    },
-	"00:aa:00:00:01:05/40" : {
+	"00:bb:00:00:01:05/40" : {
 		"basic": {
 			"locations": ["of:0000000000000003/9"],
 			"ips": ["1006::3fe"]
 		     }
 	    },
-	"00:aa:00:00:00:06/30" : {
+	"00:bb:00:00:00:06/30" : {
 		"basic": {
 			"locations": ["of:0000000000000004/6"],
 			"ips": ["1007::3fe"]
 		     }
 	    },
-	"00:aa:00:00:00:07/40" : {
+	"00:bb:00:00:00:07/40" : {
 		"basic": {
 			"locations": ["of:0000000000000005/6", "of:0000000000000004/7"],
 			"ips": ["1008::3fe"]
 		     }
 	    },
-	"00:aa:00:00:00:08/40" : {
+	"00:bb:00:00:00:08/40" : {
 		"basic": {
 			"locations": ["of:0000000000000004/8","of:0000000000000005/7"],
 			"ips": ["1009::3fe"]
 		     }
 	    },
-	"00:aa:00:00:00:0A/40" : {
+	"00:bb:00:00:00:0A/40" : {
 		"basic": {
 			"locations": ["of:0000000000000005/8"],
 			"ips": ["1010::3fe"]