fix docblocks : Zend_ should be Zend\
update naming
Zend\\Mime\\Mime::LINEEND
Merge branch 'hotfix/4529'

Close #4529
Merge pull request #4421 from samsonasik/fix/docblock.Zend_

fix docblocks : "Zend_" should be "Zend\" and some typos
[#4421] Fix unit tests

- Since class name listed in exception changed, expected exception message
  needed to change
Merge branch 'hotfix/4421' into develop

Forward port #4421