Periodic measurement support

[squaregoldfish]

Fix #2727 Fix #249

[codecov[bot]]

Codecov Report

Merging #2775 (ece56ac) into master (48d7795) will increase coverage by 0.14%. The diff coverage is 40.47%.

@@             Coverage Diff              @@
##             master    #2775      +/-   ##
============================================
+ Coverage     22.07%   22.21%   +0.14%     
- Complexity     1523     1534      +11     
============================================
  Files           373      380       +7     
  Lines         18921    19269     +348     
  Branches       2503     2558      +55     
============================================
+ Hits           4176     4280     +104     
- Misses        14454    14687     +233     
- Partials        291      302      +11     

Flag	Coverage Δ
unittests	22.21% <40.47%> (+0.14%)	:arrow_up:

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
...k/ac/exeter/QuinCe/data/Dataset/DataSetDataDB.java	17.26% <ø> (+1.58%)	:arrow_up:
...exeter/QuinCe/data/Dataset/MeasurementLocator.java	0.00% <ø> (ø)
...uinCe/data/Dataset/MeasurementValueCalculator.java	0.00% <ø> (-12.50%)	:arrow_down:
...ata/Dataset/MeasurementValueCalculatorFactory.java	0.00% <ø> (ø)
.../ExternalStandards/ExternalStandardsQCRoutine.java	12.50% <ø> (ø)
...a/Dataset/SensorValuesListValueTimeComparator.java	100.00% <100.00%> (ø)
...ac/exeter/QuinCe/data/Instrument/InstrumentDB.java	28.45% <ø> (ø)
.../data/Instrument/SensorDefinition/SensorGroup.java	72.00% <ø> (ø)
...xeter/QuinCe/jobs/files/LocateMeasurementsJob.java	0.00% <ø> (ø)
...p/src/uk/ac/exeter/QuinCe/utils/DateTimeUtils.java	66.66% <100.00%> (+1.96%)	:arrow_up:
... and 37 more

... and 4 files with indirect coverage changes