Fixed access to report schedules related tasks for non-admin user.

Fixed code so non-admin users are able to perform schedules related tasks in Reports explorer.
- Changed MiqSchedule related buttons ids under Reports explorer to be unique, there were duplicate ids in product features yaml as schedules can be managed thru OPS explorer as well. Each feature in product features needs to have a unique id.
- Changed any existing assert_priviliges check and other related code in reports explorer to set/check for updated button ids
- Fixed any broken spec tests by these changes

https://bugzilla.redhat.com/show_bug.cgi?id=1118726
https://bugzilla.redhat.com/show_bug.cgi?id=1142447
Addressed rubocop comments.

https://bugzilla.redhat.com/show_bug.cgi?id=1118726
https://bugzilla.redhat.com/show_bug.cgi?id=1142447
Fixed count of feature ids in spec test.

Test broke after another PR was merged that added a feature to product features yml.

https://bugzilla.redhat.com/show_bug.cgi?id=1118726
https://bugzilla.redhat.com/show_bug.cgi?id=1142447
Addressed issues found in PR testing.

Added schedule view feature so user can see Schedules accordion even when they are not allowed to modify schedules records.

https://bugzilla.redhat.com/show_bug.cgi?id=1118726
https://bugzilla.redhat.com/show_bug.cgi?id=1142447
Addressed rubocop issues with case indentation.

https://bugzilla.redhat.com/show_bug.cgi?id=1118726
https://bugzilla.redhat.com/show_bug.cgi?id=1142447
Merge pull request #623 from h-kataria/fixed_report_schedules_feature_ids

Fixed access to report schedules related tasks for non-admin user.