restore integration-docroot-jslint

The job template '{name}-jslint' has been made reusable.

Change-Id: I01512aabc0c30e653d44d2f6776f77e1ff6f369a
labs/tools/grrrit : jslint + yamllint

Change-Id: I7eed02c9e778a50de99c0b42a88193dd149eaa1e