Add integration tests for Locate using new attributes

This change adds integration tests that verify that objects can
be found by Locate when filtering off of the new ObjectGroup and
ApplicationSpecificInformation attributes. Some minor tweaks to
the database attribute models are included to simplify usage.

kmip/pie/objects.py

@@ -1831,10 +1831,12 @@ class ApplicationSpecificInformation(sql.Base):
             raise TypeError("The application data must be a string.")
 
     def __repr__(self):
-        application_namespace = "application_namespace={}".format(
+        application_namespace = "application_namespace='{}'".format(
             self.application_namespace
         )
-        application_data = "application_data={}".format(self.application_data)
+        application_data = "application_data='{}'".format(
+            self.application_data
+        )
 
         return "ApplicationSpecificInformation({})".format(
             ", ".join(
@@ -1877,8 +1879,7 @@ class ObjectGroup(sql.Base):
     _object_group = sqlalchemy.Column(
         "object_group",
         sqlalchemy.String,
-        nullable=False,
-        unique=True
+        nullable=False
     )
     managed_objects = sqlalchemy.orm.relationship(
         "ManagedObject",
@@ -1909,7 +1910,7 @@ class ObjectGroup(sql.Base):
             raise TypeError("The object group must be a string.")
 
     def __repr__(self):
-        object_group = "object_group={}".format(self.object_group)
+        object_group = "object_group='{}'".format(self.object_group)
 
         return "ObjectGroup({})".format(object_group)