Add first batch of tests for conflict detection among events
Detecting conflicts among a collection of events
is super critical to the proper functioning of
UDPOR (it is primarily used to compute en(C) for
a given configuration). Testing conflicts among
events in an event structure is very important.
Subsequent commits and MRs will continue to add
tests for detecting conflicts among collections
of events.
Detecting immediate conflicts is also critical
when it comes to determining which events UDPOR
decides to keep around after continuing its search.
Immediate conflicts are more subtle and should be
tested with great care.
