update pgo create user CLI help text, update version numbers in sample load resource examples

Author: jmccormick2001

examples/sample-json-load-config.yaml

@@ -1,5 +1,5 @@
 COImagePrefix:  crunchydata
-COImageTag:  centos7-3.2.0
+COImageTag:  centos7-3.3.0
 DbDatabase:  userdb
 DbUser:  postgres
 DbPort:  5432

examples/sample-load-config.yaml

@@ -1,5 +1,5 @@
 COImagePrefix:  crunchydata
-COImageTag:  centos7-3.2.0
+COImageTag:  centos7-3.3.0
 DbDatabase:  userdb
 DbUser:  postgres
 DbPort:  5432

pgo/cmd/create.go

@@ -199,6 +199,7 @@ var createUserCmd = &cobra.Command{
 	Short: "Create a PostgreSQL user",
 	Long: `Create a postgres user. For example:
 
+    pgo create user manageduser --managed --selector=name=mycluster
     pgo create user user1 --selector=name=mycluster`,
 	Run: func(cmd *cobra.Command, args []string) {
 		log.Debug("create user called ")