rosie go: fix appearance of new suite in local suites
Merge pull request #1340 from benfitzpatrick/rosie-go.fix-create-see-local-copy

rosie go: fix appearance of new suite in local suites
Rephrase *cycle time* to *cycle point*

Fix tests for cylc 6.
When checking whether a suite is running or not, allow reasons to
contain all lines of the `pgrep` command.
Fix `date_format` in `rose.date`.

Simply return `TimePoint` object if format string is `None`.