[FAB-7323] Updates to ResourceMgmtClient interface

Changed package name to resmgmtclient in adherence with Go package
naming conventions.

Ran tests via `make all` without error.

Change-Id: Iae5d97365db35e679751db3f5c3f7b58c792de4f
Signed-off-by: Nick Chang-Fong <nick@diid.today>

api/apitxn/resmgmtclient/resmgmt.go

@@ -4,7 +4,7 @@ Copyright SecureKey Technologies Inc. All Rights Reserved.
 SPDX-License-Identifier: Apache-2.0
 */
 
-package resmgmt
+package resmgmtclient
 
 import (
 	"time"
@@ -82,7 +82,7 @@ type UpgradeCCOpts struct {
 // ResourceMgmtClient is responsible for managing resources: peers joining channels, and installing and instantiating chaincodes(TODO).
 type ResourceMgmtClient interface {
 
-	// InstallCC - install chaincode
+	// InstallCC installs chaincode
 	InstallCC(req InstallCCRequest) ([]InstallCCResponse, error)
 
 	// InstallCCWithOpts installs chaincode with custom options (specific peers, filtered peers)