Description of problem:


When running katello-disconnected with the --start_date or --end_date switches, 
export fails




Version-Release number of selected component (if applicable):
foreman-1.6.0.53-1.el6sat.noarch
katello-utils-1.5.16-1.el6sat.noarch
mod_wsgi-3.4-1.pulp.el6sat.x86_64
pulp-katello-0.3-4.el6sat.noarch
pulp-nodes-common-2.4.4-1.el6sat.noarch
pulp-nodes-parent-2.4.4-1.el6sat.noarch
pulp-puppet-plugins-2.4.4-1.el6sat.noarch
pulp-puppet-tools-2.4.4-1.el6sat.noarch
pulp-rpm-plugins-2.4.4-1.1.el6sat.noarch
pulp-selinux-2.4.4-1.el6sat.noarch
pulp-server-2.4.4-1.el6sat.noarch
python-isodate-0.5.0-1.pulp.el6sat.noarch
python-kombu-3.0.15-12.pulp.el6sat.noarch
python-pulp-bindings-2.4.4-1.el6sat.noarch
python-pulp-common-2.4.4-1.el6sat.noarch
python-pulp-puppet-common-2.4.4-1.el6sat.noarch
python-pulp-rpm-common-2.4.4-1.1.el6sat.noarch
ruby193-rubygem-foreman-tasks-0.6.9-1.2.el6sat.noarch
ruby193-rubygem-katello-1.5.0-98.el6sat.noarch

How reproducible:
100%

Steps to Reproduce:
1. setup katello-disconnected as per the docs

2. run katello-disconnected specifying a repo and date range



Actual results:
 # katello-disconnected export -r rhel-7-server-rpms-7Server-x86_64 -t /var/tmp/export2/  -s "2014-06-01 00:00:00" -n "2015-05-01 00:00:00" 
/usr/share/katello-disconnected/lib/disconnected_pulp.rb:289:in `export': undefined local variable or method `start' for #<DisconnectedPulp:0x00000003404838> (NameError)
        from /usr/bin/katello-disconnected:503:in `<main>'


Expected results:
Export should complete without error and with only the content that is within the date ranges specified above. 

Additional info: