[IMPROVED] Pass more Rubocop tests

* [CHANGE] Adjusted line lenghts to 100 cars
* [CHANGE] Added encoding header
* [CHANGE] Updated all files triggering errors in rubocop
[FIX] User Chefspec 3.0.0.beta
[FIX] Further work on Rubocop and Chefspec

* [FIX] Pass chefspec 3 tests in server spec
 * A lot of features were removed since content matching doesn't work
* [UPDATE] Do not run rubocop inside cookbooks installation but local
* [UPDATE] Fixed server installation recipe
[UPDATE] Finilized rubocop/chefspec 3

* [FIX] Re-added template content checks
* [FIX] Proper passing of template variables