Fix test schema cleanup failure by setting owner to root for all testrange functions before dropping schema (resolves #26)

Author: chenyunliang520

tests/types/test_range.py

@@ -270,6 +270,12 @@ def create_test_range(conn):
 
     conn.execute(
         """
+        ALTER FUNCTION testschema.testrange(double precision, double precision) OWNER TO root;
+        ALTER FUNCTION testschema.testrange(double precision, double precision, text) OWNER TO root;
+
+        ALTER FUNCTION public.testrange(text, text, text) OWNER TO root;
+        ALTER FUNCTION public.testrange(text, text) OWNER TO root;
+        
         drop schema if exists testschema cascade;
         create schema testschema;