mock_ElectricalSeries : Make number of electrodes betweeen data an electrode region agree when explicitly passing data

[h-mayorquin]

Motivation

The following code raises this warning:

import numpy as np
from pynwb.testing.mock.ecephys import mock_ElectricalSeries
from pynwb.testing.mock.file import mock_NWBFile


data = np.ones((10000000,128))

nwbfile = mock_NWBFile()

ts = mock_ElectricalSeries(data=data, nwbfile=nwbfile)
/home/heberto/development/pynwb/src/pynwb/ecephys.py:109: UserWarning: ElectricalSeries 'ElectricalSeries2': The second dimension of data does not match the length of electrodes. Your data may be transposed.
  warnings.warn("%s '%s': The second dimension of data does not match the length of electrodes. "

This PR fixes the mock by adjusting the number of electrodes when data is passed explicitly.

Checklist

• Did you update CHANGELOG.md with your changes?
• Have you checked our Contributing document?
• Have you ensured the PR clearly describes the problem and the solution?
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• Have you checked to ensure that there aren't other open Pull Requests for the same change?
• Have you included the relevant issue number using "Fix #XXX" notation where XXX is the issue number? By including "Fix #XXX" you allow GitHub to close issue #XXX when the PR is merged.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.73%. Comparing base (739ee54) to head (45e86c0).

Additional details and impacted files

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##              dev    #2019   +/-   ##
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  Coverage   91.73%   91.73%           
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  Files          27       27           
  Lines        2722     2722           
  Branches      710      710           
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  Hits         2497     2497           
  Misses        149      149           
  Partials       76       76           

Flag	Coverage Δ
integration	72.96% <ø> (ø)
unit	82.29% <ø> (ø)

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