reduce complexity

conf/bi.config

@@ -4,12 +4,11 @@ params{
   config_profile_url = 'https://www.boehringer-ingelheim.com/'
 }
 
-def configVar = System.getenv('NXF_GLOBAL_CONFIG')
-if(configVar  == null)
+params.globalConfig = System.getenv('NXF_GLOBAL_CONFIG')
+if(params.globalConfig == null)
 {
     def errorMessage = "WARNING: For bi.config requires NXF_GLOBAL_CONFIG env var to be set. Point it to global.config file if you want to use this profile."
     System.err.println(errorMessage)
 }else{
-    params.globalConfig = configVar
-    includeConfig configVar
+    includeConfig params.globalConfig
 }