Allow disabling the cli when running in the coherence-operator (#132)

cohctl/main.go

@@ -1,13 +1,15 @@
 /*
- * Copyright (c) 2021, Oracle and/or its affiliates.
+ * Copyright (c) 2021, 2023 Oracle and/or its affiliates.
  * Licensed under the Universal Permissive License v 1.0 as shown at
  * https://oss.oracle.com/licenses/upl.
  */
 
 package main
 
 import (
+	"fmt"
 	"github.com/oracle/coherence-cli/pkg/cmd"
+	"os"
 )
 
 var (
@@ -21,5 +23,9 @@ var (
 
 // main is the main entry point to Coherence CLI
 func main() {
+	if os.Getenv("CLI_DISABLED") != "" {
+		fmt.Println("cohctl has been disabled from running in the Coherence Operator")
+		return
+	}
 	cmd.Execute(Version, Date, Commit)
 }