fix click_on_zone string and support server list in zone detail
Updating services pages for required request approval
Merge pull request #170 from aweiteka/extend_zone_pg

fix click_on_zone string and support server list in zone detail
Merge pull request #171 from rlandy/provisioning_pgs

Updating services pages for required request approval
Refactor navigation plugin to cfme_pages. Refactor tests to use navigation fixtures