Fixed PHPDoc Blocks

These ```RunTimeExceptions``` are NOT the native ones, therefor the should not be ```\``` in front of them.
Merge branch '2.2' into 2.3

* 2.2:
  [Security] fixed some phpdoc
  Fixed PHPDoc Blocks
  optimized circular reference checker
  [HttpKernel] changed fragment URLs to be relative by default (closes #8458)