apache::mod::mime does not compile due to wrong file dependency

Update rspec-puppet and add compilation specs to catch these errors
Add basic acceptance test for apache::mod::mime
Fix too many backslashes in FreeBSD regex for APACHE_PORT
Bad dependency to .load files in apache::mod

Fixes error "expected that the catalogue would include File[/etc/apache2/mods-available/proxy_html.load]"
Add compilation specs