Update test cases for new egress mirror tag

Author: daall

src/sonic-config-engine/tests/t0-sample-graph.xml

@@ -303,6 +303,11 @@
           <InAcl>everflowV6</InAcl>
           <Type>Everflow</Type>
         </AclInterface>
+	<AclInterface>
+          <AttachTo>EGRESS_ERSPAN</AttachTo>
+	  <OutAcl>everflow_egress</OutAcl>
+	  <Type>Everflow</Type>
+        </AclInterface>
         <AclInterface>
           <AttachTo>PortChannel01;PortChannel02;PortChannel03;PortChannel04</AttachTo>
           <InAcl>DataAclIngress</InAcl>

src/sonic-config-engine/tests/test_cfggen.py

@@ -111,6 +111,7 @@ def test_minigraph_acl(self):
                                          "Warning: ignore interface 'fortyGigE0/2' in DEVICE_NEIGHBOR as it is not in the port_config.ini\n"
                                          "{'NTP_ACL': {'services': ['NTP'], 'type': 'CTRLPLANE', 'policy_desc': 'NTP_ACL', 'stage': 'ingress'}, "
                                          "'EVERFLOW': {'stage': 'ingress', 'type': 'MIRROR', 'ports': ['PortChannel01', 'PortChannel02', 'PortChannel03', 'PortChannel04', 'Ethernet4'], 'policy_desc': 'EVERFLOW'}, "
+                                         "'EVERFLOW_EGRESS': {'stage': 'egress', 'type': 'MIRROR', 'ports': ['PortChannel01', 'PortChannel02', 'PortChannel03', 'PortChannel04', 'Ethernet4'], 'policy_desc': 'EVERFLOW_EGRESS'}, "
                                          "'ROUTER_PROTECT': {'services': ['SSH', 'SNMP'], 'type': 'CTRLPLANE', 'policy_desc': 'ROUTER_PROTECT', 'stage': 'ingress'}, "
                                          "'DATAACLINGRESS': {'stage': 'ingress', 'type': 'L3', 'ports': ['PortChannel01', 'PortChannel02', 'PortChannel03', 'PortChannel04'], 'policy_desc': 'DATAACLINGRESS'}, "
                                          "'SNMP_ACL': {'services': ['SNMP'], 'type': 'CTRLPLANE', 'policy_desc': 'SNMP_ACL', 'stage': 'ingress'}, "