add default value to profile env variable (#3443)

* add default value to profile env variable

* set env variable conditionally

Author: dwentland24

lib/command/run.js

@@ -8,7 +8,11 @@ module.exports = async function (test, options) {
   // registering options globally to use in config
   // Backward compatibility for --profile
   process.profile = options.profile;
-  process.env.profile = options.profile;
+
+  if (options.profile) {
+    process.env.profile = options.profile;
+  }
+
   const configFile = options.config;
 
   let config = getConfig(configFile);