VOL-1558 Implementation of openolt adapter with dep for dependency management
Also updated the build system to take this into account.

Currently dep ensure fails due to missing libraries in voltha-go, but the vendor folder has been updated otherwise.
This can be worked around in development using the LOCAL_VOLTHAGO variable described in the readme
This does not build currrently, but that is due to missing code in voltha-go master.

This pattern is consistent with how voltha-go does things, but does not leave you dependent on it to build.

See the readme for how to use dep.

The resourcemanager file is no longer hidden.

Change-Id: I25b8472dbc517b193970597c9f43ddff18c2d89f
diff --git a/vendor/github.com/hashicorp/serf/website/source/LICENSE b/vendor/github.com/hashicorp/serf/website/source/LICENSE
new file mode 100644
index 0000000..36c29d7
--- /dev/null
+++ b/vendor/github.com/hashicorp/serf/website/source/LICENSE
@@ -0,0 +1,10 @@
+# Proprietary License
+
+This license is temporary while a more official one is drafted. However,
+this should make it clear:
+
+* The text contents of this website are MPL 2.0 licensed.
+
+* The design contents of this website are proprietary and may not be reproduced
+  or reused in any way other than to run the Serf website locally. The license
+  for the design is owned solely by HashiCorp, Inc.