Fixed rubocop MethodMissing while still preventing exceptions when an environment variable is undefined

Author: e100

.rubocop.yml

@@ -21,3 +21,6 @@ Metrics/PerceivedComplexity:
   Max: 10
 Metrics/AbcSize:
   Max: 29
+Style/MethodMissing:
+  Exclude:
+    - 'libraries/process_env_var.rb'

libraries/process_env_var.rb

@@ -29,11 +29,7 @@ def initialize(process)
   end
 
   def method_missing(name)
-    if read_params[name]
-      read_params[name.to_s] 
-    else 
-      ''
-    end
+    read_params[name.to_s] || ''
   end
 
   def read_params