Introduction of 'offline' parameter

Adds a boolean parameter to the createEvent() method which specifies whether the event was found by an offline (True) or online/low-latency search (False). Default is set to offline=False so that in the worst-case scenario, an offline event is marked as online, which is the same as the current behavior.

Note that this branch is based off of !15 (merged), so that should be merged first (hence why this is marked as WIP). Currently the changes shown below feature those changes as well. This requires a server code update as well, which is shown here: gracedb!4.

marked as a Work In Progress

added 3 commits

• 91485612 - 1 commit from branch master
• ee6ac11e - Adding offline boolean parameter to specify whether event was identified by an o…
• e5a27180 - Adding unit tests for offline parameter

Compare with previous version

The previous commits were added by merging !15 (merged) into master and rebasing this branch off of master.

unmarked as a Work In Progress

merged

mentioned in commit b47655ef