Javascript force use of the identity operator

    In order to reduce possible bugs in our scripts the use of identity
operator must be mandatory over the equality operator. This rule force
developers to use the '===' and '!==' instead of '==' and '!='.

Change-Id: I1069ed2baed7bce305fce80d688a5a2c10249148
Implements: blueprint jshint-codestyle
Merge "Javascript force use of the identity operator"