Mock more of the Glue Data Catalog APIs

This adds some of the missing Get/Update/Create APIs relating to the
Glue data catalog -- but not yet all of them, and none of the Batch* API
calls.

moto/glue/exceptions.py

@@ -6,19 +6,56 @@ class GlueClientError(JsonRESTError):
     code = 400
 
 
-class DatabaseAlreadyExistsException(GlueClientError):
-    def __init__(self):
-        self.code = 400
-        super(DatabaseAlreadyExistsException, self).__init__(
-            'DatabaseAlreadyExistsException',
-            'Database already exists.'
+class AlreadyExistsException(GlueClientError):
+    def __init__(self, typ):
+        super(GlueClientError, self).__init__(
+            'AlreadyExistsException',
+            '%s already exists.' % (typ),
         )
 
 
-class TableAlreadyExistsException(GlueClientError):
+class DatabaseAlreadyExistsException(AlreadyExistsException):
     def __init__(self):
-        self.code = 400
-        super(TableAlreadyExistsException, self).__init__(
-            'TableAlreadyExistsException',
-            'Table already exists.'
+        super(DatabaseAlreadyExistsException, self).__init__('Database')
+
+
+class TableAlreadyExistsException(AlreadyExistsException):
+    def __init__(self):
+        super(TableAlreadyExistsException, self).__init__('Table')
+
+
+class PartitionAlreadyExistsException(AlreadyExistsException):
+    def __init__(self):
+        super(PartitionAlreadyExistsException, self).__init__('Partition')
+
+
+class EntityNotFoundException(GlueClientError):
+    def __init__(self, msg):
+        super(GlueClientError, self).__init__(
+            'EntityNotFoundException',
+            msg,
         )
+
+
+class DatabaseNotFoundException(EntityNotFoundException):
+    def __init__(self, db):
+        super(DatabaseNotFoundException, self).__init__(
+            'Database %s not found.' % db,
+        )
+
+
+class TableNotFoundException(EntityNotFoundException):
+    def __init__(self, tbl):
+        super(TableNotFoundException, self).__init__(
+            'Table %s not found.' % tbl,
+        )
+
+
+class PartitionNotFoundException(EntityNotFoundException):
+    def __init__(self):
+        super(PartitionNotFoundException, self).__init__("Cannot find partition.")
+
+
+class VersionNotFoundException(EntityNotFoundException):
+    def __init__(self):
+        super(VersionNotFoundException, self).__init__("Version not found.")