Fix the review comments.

Author: yogeshmahajan-1903

web/pgadmin/__init__.py

@@ -337,7 +337,11 @@ def get_locale():
     ##########################################################################
     if config.CONFIG_DATABASE_URI is not None and \
             len(config.CONFIG_DATABASE_URI) > 0:
-        app.config['SQLALCHEMY_DATABASE_URI'] = config.CONFIG_DATABASE_URI
+        _db_uri = re.sub(
+            r"^postgres(ql)?://", "postgresql+psycopg://",
+            config.CONFIG_DATABASE_URI, count=1
+        )
+        app.config['SQLALCHEMY_DATABASE_URI'] = _db_uri
     else:
         app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///{0}?timeout={1}' \
             .format(config.SQLITE_PATH.replace('\\', '/'),

web/pgadmin/utils/check_external_config_db.py

@@ -7,6 +7,8 @@
 #
 ##########################################################################
 
+import re
+
 from sqlalchemy import create_engine, inspect
 
 
@@ -15,9 +17,10 @@ def check_external_config_db(database_uri):
     Check if external config database exists if it
     is being used.
     """
-    if database_uri.startswith("postgresql://") or database_uri.startswith(
-            "postgres://"):
-        database_uri = database_uri.replace("://", "+psycopg://", 1)
+    if database_uri.startswith(("postgresql://", "postgres://")):
+        database_uri = re.sub(
+            r"^postgres(ql)?://", "postgresql+psycopg://", database_uri, count=1
+        )
     engine = create_engine(database_uri)
     try:
         connection = engine.connect()