Add read tests for TimeSeries , VectorData, Data, ElementIdentifers, Device`

[oruebel]

Add unit tests for readfor TimeSeries For every neurodata_type we should test that: a) the type itself can be read from file, and b) that all DEFINE_FIELDS specified for read can be read.

• Add base read test for TimeSeries

Fix #32 As part of writing the tests for TimeSeries, we should also double-check that all fields that AqNWB writes, that they are also exposed for read and that all types listed for read are also written.

• Add missing TimeSeries.data.offset attribute on write
• Add missing TimeSeries.data.continuity attribute on write
• Add missing fields control and control_description datasets on write (read via readControlDescription andreadControl)
• Add missing field starting_time dataset and corresponding attributes unit and rate on write (read via readStartingTime, readStartingTimeUnit, readStartingTimeRate
• Move the creation of neurodata_type and namespace attributes to Container and add corresponding DEFINE_FIELDs for read

Fix #126 handling of Data and VectorData:

• Moved creation of neurodata_type and namespace attributes to Data and added DEFINE_FIELD for those (similar to Container)
• Added initalize() methods for Data and VectorData
• Update DynamicTable and ElectrodeTable to call VectorData.initalize instead of setting up VectorData manually

Added write/read tests for additional types

• VectorData with int, double, and string data
• Data with a single type (the remaining is covered by the VectorData tests)
• ElementIdentifiers and updated the class to overwrite the readData method to set the data type to int by default
• Device

Additional fixes needed:

• Fix handling on controlDescription see Add read tests for TimeSeries , VectorData, Data, ElementIdentifers, Device` #124 (comment)

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.01%. Comparing base (44e957d) to head (b91dd24).

Additional details and impacted files

@@             Coverage Diff              @@
##           add_read     #124      +/-   ##
============================================
+ Coverage     90.87%   91.01%   +0.13%     
============================================
  Files            53       53              
  Lines          3289     3349      +60     
  Branches        229      229              
============================================
+ Hits           2989     3048      +59     
- Misses          290      291       +1     
  Partials         10       10              

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[oruebel]

@stephprince this PR is now ready for you to take a look at

[stephprince]

I've added my review comments for the TimeSeries tests, but I have not gotten to the Vector Data or Table related changes yet

[stephprince]

Finished looking through the other files, other than the previous comments all looks good to me!