Adding OpenOLT repo to OpenCORD

Change-Id: I16cb5e1ade99168c832c612a073d613ea31fd9e9
diff --git a/default.xml b/default.xml
index 9245880..272aec5 100644
--- a/default.xml
+++ b/default.xml
@@ -89,5 +89,6 @@
     <linkfile src="." dest="incubator/voltha/chameleon"/>
 </project>
 <project path="incubator/voltha" name="voltha" groups="incubation,voltha"/>
+<project path="incubator/openolt" name="openolt" groups="incubation,voltha"/>
 
 </manifest>