Fix FAB-1173

Assign host port 15984 to guest 5984 (CouchDB) to avoid collision
with existing CounchDB

Change-Id: I0dbe96f717bf561ecd750da2c2050eaf416e69a2
Signed-off-by: Christopher Ferris <chrisfer@us.ibm.com>

devenv/Vagrantfile

@@ -38,7 +38,7 @@ Vagrant.configure('2') do |config|
   config.vm.network :forwarded_port, guest: 7051, host: 7051 # Openchain gRPC services
   config.vm.network :forwarded_port, guest: 7054, host: 7054 # Membership service
   config.vm.network :forwarded_port, guest: 7053, host: 7053 # GRPCCient gRPC services
-  config.vm.network :forwarded_port, guest: 5984, host: 5984 # CouchDB service
+  config.vm.network :forwarded_port, guest: 5984, host: 15984 # CouchDB service
 
   config.vm.synced_folder "..", "#{SRCMOUNT}"
   config.vm.synced_folder "..", "/opt/gopath/src/github.com/hyperledger/fabric"