Assert that is_l2() interfaces cannot have LCP or address; Fix consistency on 'be' vs 'have' an LCP.

unittest/yaml/error-bridgedomain2.yaml

@@ -3,7 +3,8 @@ test:
   errors:
     expected:
      - "bridgedomain .* member .* has an LCP"
-    count: 3
+     - "interface .* is in L2 mode but has LCP name .*"
+    count: 5
 ---
 interfaces:
   GigabitEthernet1/0/0:

unittest/yaml/error-bridgedomain3.yaml

@@ -5,7 +5,8 @@ test:
      - "interface .* has an address but no LCP"
      - "sub-interface .* has an address but .* does not have LCP"
      - "bridgedomain .* member .* has an address"
-    count: 6
+     - "interface .* is in L2 mode but has an address"
+    count: 8
 ---
 interfaces:
   GigabitEthernet1/0/0:

unittest/yaml/error-l2xc4.yaml

@@ -2,11 +2,13 @@ test:
   description: "L2 cross connect targets cannot have an IP address or LCP"
   errors:
     expected:
-     - "interface .* has l2xc so it cannot be an LCP"
+     - "interface .* has l2xc so it cannot have an LCP"
      - "interface .* has l2xc so it cannot have an address"
-     - "interface .* l2xc target .* cannot be an LCP"
+     - "interface .* l2xc target .* cannot have an LCP"
      - "interface .* l2xc target .* cannot have an address"
-    count: 6
+     - "interface .* is in L2 mode but has LCP name .*"
+     - "interface .* is in L2 mode but has an address"
+    count: 9
 ---
 interfaces:
   GigabitEthernet1/0/0:

unittest/yaml/error-l2xc6.yaml

@@ -3,7 +3,7 @@ test:
   errors:
     expected:
      - "sub-interface .* l2xc target .* cannot have an address"
-     - "sub-interface .* l2xc target .* cannot be an LCP"
+     - "sub-interface .* l2xc target .* cannot have an LCP"
     count: 2
 ---
 interfaces: