update gem file and integrate chef spec 4

Signed-off-by: Christoph Hartmann <chris@lollyrock.com>
make chef spec tests a default task

Signed-off-by: Christoph Hartmann <chris@lollyrock.com>
add chef server to spec helper and integrate coverage report

Signed-off-by: Christoph Hartmann <chris@lollyrock.com>
bugfix permission setting and add spec test

Signed-off-by: Christoph Hartmann <chris@lollyrock.com>
bugfix permission setting and add spec test for server recipe

Signed-off-by: Christoph Hartmann <chris@lollyrock.com>
fix typo
Merge pull request #39 from TelekomLabs/chef-spec

Chef Spec Tests