Avoid renaming template's extension if it's JSON or YAML
Avoid renaming template's extension if it's JSON or YAML

Signed-off-by: Soshi Katsuta <37be56e1b0b2d8665f687408a43d44ca133648fd@gmail.com>

bulletproofnetworks/stack_master,envato/stack_master,bulletproofnetworks/stack_master,envato/stack_master,bulletproofnetworks/stack_master