add multicase namespace samples

Author: scetron

tests/integration/sqcmds/multicast-samples/igmp.yml

@@ -0,0 +1,10 @@
+description: 'Testing verbs for igmp'
+tests:
+- command: igmp show
+  data-directory: tests/data/parquet//
+  marks: multicast igmp
+  output: '[]'
+- command: igmp summarize
+  data-directory: tests/data/parquet//
+  marks: multicast igmp
+  output: '[]'

tests/integration/sqcmds/multicast-samples/mroute.yml

@@ -0,0 +1,10 @@
+description: 'Testing verbs for mroutes'
+tests:
+- command: mroute show
+  data-directory: tests/data/parquet//
+  marks: multicast mroute
+  output: '[]'
+- command: mroute summarize
+  data-directory: tests/data/parquet//
+  marks: multicast mroute
+  output: '[]'