WIP: Listify numpy arrays

[ghost]

Not ready for merge.

In accordance with https://github.com/NSLS-II/bluesky/pull/674

• Removes the deprecated example, not the 'sample_data' (should improve coverage).
• Listifies the numpy arrays on the way in.
• Tests that numpy arrays are inserted within individual and bulk event data fields.
• Tested with bs and ophyd master.

TODO:

• Needs to be tested with the bluesky and databroker once corresponding prs are merged.
• Update metadataclient for ISS.

[codecov-io]

Codecov Report

Merging #266 into master will decrease coverage by 0.17%. The diff coverage is 83.33%.

@@            Coverage Diff             @@
##           master     #266      +/-   ##
==========================================
- Coverage   90.35%   90.18%   -0.18%     
==========================================
  Files           4        4              
  Lines         477      489      +12     
  Branches       75       80       +5     
==========================================
+ Hits          431      441      +10     
- Misses         31       33       +2     
  Partials       15       15

Impacted Files	Coverage Δ
metadatastore/core.py	93.3% <ø> (ø)	:arrow_up:
metadatastore/mds.py	85.95% <83.33%> (-0.19%)	:arrow_down:

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[tacaswell]

https://github.com/NSLS-II/bluesky/blob/b92e1a42f188fd7efa982c3ac1c8a064c1879a50/bluesky/utils.py#L837 is how we are currently doing this. This has the advantage of not copying lists.