Fixed travis unit tests

Update address objects
Update generate melicode scope
Update mobile generator of faker

Solved randomNumber function to return valid length
Fixed meliCode method to not null return

Update randomString statement

Added get randomKey method to Faker object to get random key from array or key of object
Solved some bugs from codesniffer report

Update randomString loop stetment

Added randomNumber helper function
Added generate melicode , city faker