define as private GanttHelperTest helper methods

--HG--
extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4012787
replace shoulda context "#number_of_rows" at GanttHelperTest

--HG--
extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4012788
replace shoulda context "#number_of_rows_on_project" at GanttHelperTest

--HG--
extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4012789
replace shoulda context "#subjects" at GanttHelperTest

--HG--
extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4012790
Rails4: fix "assert_template 'form'" fails at IssuesControllerTest

--HG--
extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4012791
use escaped "can't" constant at TrackersControllerTest

--HG--
extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4012792
define constant of escaped "Can't" for tests

--HG--
extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4012793
use escaped "Can't" constant at TrackersControllerTest

--HG--
extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4012794