only test against different Symfony versions with PHP 5.5

This change was backported from the 1.1 development branch.
fix the pagination output for empty result lists

When the API returned an empty video result set, the panda:video:list
command showed a misleading pagination info:

  Page 1 of 0

This informational output is no longer printed for empty result sets.

This change was backported from the 1.1 development branch.