Fix remaining Flake8 whitespace issues

Fix the following Flake8 errors:
- E211 (whitespace before opening parenthesis)
- E241 (multiple spaces after comma)

Reviewed By: tnfchris

Differential Revision: https://reviews.llvm.org/D94791

Author: Thomas Preud'homme

lnt/server/db/v4db.py

@@ -50,7 +50,7 @@ def _load_schemas(self):
             tsdb = lnt.server.db.testsuitedb.TestSuiteDB(self, name, suite)
             self.testsuite[name] = tsdb
         # Order testuites alphabetically to get groupings
-        self.testsuite = dict (sorted (self.testsuite.items()))
+        self.testsuite = dict(sorted(self.testsuite.items()))
 
     def __init__(self, path, config, baseline_revision=0):
         # If the path includes no database type, assume sqlite.

lnt/server/ui/app.py

@@ -53,7 +53,7 @@ class LNTObjectJSONEncoder(flask.json.JSONEncoder):
     """Take SQLAlchemy objects and jsonify them. If the object has an __json__
     method, use that instead."""
 
-    def __init__(self,  *args, **kwargs):
+    def __init__(self, *args, **kwargs):
         super(LNTObjectJSONEncoder, self).__init__(*args, **kwargs)
 
     def default(self, obj):