Add libapache2-mod-perl2 to Depends

| 18:04:37   Setting up ngcp-panel (1.0.13+0~20130819154931.451+wheezy~1.gbp147ec8) ...
| 18:04:37   ERROR: Module perl does not exist!
| 18:04:37   Enabling module ssl.

 -- https://jenkins.mgm.sipwise.com/view/piuparts/job/ngcp-panel-piuparts/325/console

debian/control

@@ -45,6 +45,7 @@ Homepage: http://sipwise.com/
 Package: ngcp-panel
 Architecture: all
 Depends: apache2,
+         libapache2-mod-perl2,
          libcatalyst-actionrole-acl-perl,
          libcatalyst-modules-perl,
          libcatalyst-perl (>= 5.90040),