Ensure all errors raised from netaddr are caught

Some values would cause schema validation to fail, even if those values
were valid for the record type being created.

Change-Id: I5d85a6edd6bffeb2acf3d48037f1507611b18170

designate/schema/format.py

@@ -31,7 +31,7 @@ def is_ipv4(instance):
         # netaddr happly accepts, and expands "127.0" into "127.0.0.0"
         if str(address) != instance:
             return False
-    except netaddr.AddrFormatError:
+    except Exception:
         return False
 
     if instance == '0.0.0.0':  # RFC5735
@@ -44,7 +44,7 @@ def is_ipv4(instance):
 def is_ipv6(instance):
     try:
         netaddr.IPAddress(instance, version=6)
-    except netaddr.AddrFormatError:
+    except Exception:
         return False
 
     return True

designate/tests/test_schema/test_format.py

@@ -42,6 +42,9 @@ class SchemaFormatTest(TestCase):
             '-1.0.0.1',
             '1.0.-0.1',
             '1.0.0.-1',
+            'ABCDEF',
+            'ABC/DEF',
+            'ABC\\DEF',
         ]
 
         for ipaddress in valid_ipaddresses: