check_mysqlmunin : Complain if munin plugin mysql_commands returns an error

This is important to catch  incompatibilities between the munin plugin and the mysql output

CHANGELOG

@@ -5,6 +5,8 @@ and this project **does not adhere to [Semantic Versioning](http://semver.org/sp
 
 ### Added
 
+check_mysqlmunin : Complain if munin plugin mysql_commands returns an error
+
 ### Changed
 
 ### Deprecated

evocheck.sh

@@ -1006,6 +1006,8 @@ check_mysqlmunin() {
                     test "${VERBOSE}" = 1 || break
                 fi
             done
+            munin-run mysql_commands 2> /dev/null > /dev/null
+            test $? -eq 0 || failed "IS_MYSQLMUNIN" "Munin plugin mysql_commands returned an error"
         fi
     fi
 }