Fixed an issue where the create_app() function was called twice if an SQLite database file was not present.

Remove the exec call to run the 'setup.py' instead call the setup database function directly.

web/setup.py

@@ -86,13 +86,11 @@ def load_servers(args):
         load_database_servers(args.load_servers, None, load_user, True)
 
 
-def setup_db():
+def setup_db(app):
     """Setup the configuration database."""
 
     create_app_data_directory(config)
 
-    app = create_app()
-
     print("pgAdmin 4 - Application Initialisation")
     print("======================================\n")
 
@@ -193,4 +191,5 @@ if __name__ == '__main__':
         except Exception as e:
             print(str(e))
     else:
-        setup_db()
+        app = create_app()
+        setup_db(app)