Make the user agent string tailorable via the process environment (#243)

* User agent string tailorable from environment

* User agent setting change justifies version 4.1

Author: joshuaauerbachwatson

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "@nimbella/nimbella-cli",
-  "version": "4.0.2",
+  "version": "4.1.0",
   "description": "A comprehensive CLI for the Nimbella stack",
   "main": "lib/index.js",
   "repository": {

package.json

@@ -21,7 +21,7 @@ export async function run(): Promise<void> {
   const topics = pj.oclif.topics
   const topicNames = Object.keys(topics)
   // Compute user agent
-  const userAgent = 'nimbella-cli/' + pj.version
+  const userAgent = process.env.NIM_USER_AGENT || 'nimbella-cli/' + pj.version
   // Initialize the API environment
   initializeAPI(userAgent)
   // Split an initial colon-separated topic:command token if found.  As the topic portion could be an alias, we look for that case also