Fix for the issue 3541
Changed the get/setSalt in Mcrypt and BlockCipher + added the setKey in Filter\Encrypt and Filter\Decrypt
Moved the setSalt outside the loop in testEncryptDecrypt
Added the getOriginalSalt() in Mcrypt and BlockCipher
Fixed CS issue
Removed check in getKey of Zend\Cryp\Symmetric\Mcrypt
Merge branch 'hotfix/zf3541' of git://github.com/ezimuel/zf2 into hotfix/3550
Merge branch 'hotfix/3550'

Close #3550
Fixes #3541