Prevent usage of dollar signs in admin passwords during setup

salt/common/tools/sbin/so-common

@@ -48,6 +48,6 @@ check_container() {
 
 check_password() {
     local password=$1
-    echo "$password" | egrep -v "'|\"|\\\\" > /dev/null 2>&1
+    echo "$password" | egrep -v "'|\"|\\$|\\\\" > /dev/null 2>&1
     return $?
 }