* fix: do not set max deadline for workspaces on template update
When templates are updated and schedule data is changed, we update all
running workspaces to have up-to-date scheduling information that sticks
to the new policy.
When updating the max_deadline for existing running workspaces, if the
max_deadline was before now()+2h we would set the max_deadline to
now()+2h.
Builds that don't/shouldn't have a max_deadline have it set to 0, which
is always before now()+2h, and thus would always have the max_deadline
updated.
* test: add unit test to excercise template schedule bug
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Co-authored-by: Steven Masley <stevenmasley@gmail.com>
586586e9dd