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/go-rootcerts/doc.go b/vendor/github.com/hashicorp/go-rootcerts/doc.go
new file mode 100644
index 0000000..b55cc62
--- /dev/null
+++ b/vendor/github.com/hashicorp/go-rootcerts/doc.go
@@ -0,0 +1,9 @@
+// Package rootcerts contains functions to aid in loading CA certificates for
+// TLS connections.
+//
+// In addition, its default behavior on Darwin works around an open issue [1]
+// in Go's crypto/x509 that prevents certicates from being loaded from the
+// System or Login keychains.
+//
+// [1] https://github.com/golang/go/issues/14514
+package rootcerts