Use a relative URL so that those cloning against oss.oracle.com will get the

anthony-tuininga · anthony-tuininga · commit ae6375bca0d4 · 2019-02-04T14:54:12.000-07:00
associatied version of ODPI-C from oss.oracle.com as well.
diff --git a/.gitmodules b/.gitmodules
@@ -1,4 +1,4 @@
 [submodule "odpi"]
 	path = odpi
-	url = https://github.com/oracle/odpi.git
+	url = ../odpi.git
     branch = v3.1.x
