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/adaptercore/openolt_flowmgr.go b/adaptercore/openolt_flowmgr.go
index 8d90fd8..18efb33 100644
--- a/adaptercore/openolt_flowmgr.go
+++ b/adaptercore/openolt_flowmgr.go
@@ -23,8 +23,7 @@
 	"errors"
 	"fmt"
 	"math/big"
-
-	rsrcMgr "github.com/opencord/voltha-go/adapters/openolt/adaptercore/resourcemanager"
+	rsrcMgr "github.com/opencord/voltha-openolt-adapter/adaptercore/resourcemanager"
 	"github.com/opencord/voltha-go/common/log"
 	tp "github.com/opencord/voltha-go/common/techprofile"
 	fd "github.com/opencord/voltha-go/rw_core/flow_decomposition"