Add vm to goodnames in .pylintrc

.pylintrc

@@ -139,7 +139,7 @@ variable-rgx=[a-z_][a-z0-9_]{2,30}$
 inlinevar-rgx=[A-Za-z_][A-Za-z0-9_]*$
 
 # Good variable names which should always be accepted, separated by a comma
-good-names=i,j,k,ex,Run,_,log
+good-names=i,j,k,ex,Run,_,log,vm
 
 # Bad variable names which should always be refused, separated by a comma
 bad-names=foo,bar,baz,toto,tutu,tata