VOL-1517 PON resourcemanager library for go based olt adapters

Change-Id: I9c0880d06904d0225dc0b09981cf05964a558ae5
diff --git a/Gopkg.toml b/Gopkg.toml
index 796ff2a..f728695 100644
--- a/Gopkg.toml
+++ b/Gopkg.toml
@@ -103,6 +103,10 @@
   go-tests = true
   unused-packages = true
 
-  [[prune.project]]
-    name = "github.com/opencord/voltha-protos"
-    unused-packages = false
+[[prune.project]]
+  name = "github.com/opencord/voltha-protos"
+  unused-packages = false
+
+[[constraint]]
+  branch = "master"
+  name = "github.com/boljen/go-bitmap"