Constrain lmdb for the time being.

[vEpiphyte]

No description provided.

[codecov]

Codecov Report

Merging #2075 (25544c8) into master (af93fd1) will increase coverage by 7.71%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2075      +/-   ##
==========================================
+ Coverage   89.04%   96.75%   +7.71%     
==========================================
  Files         149      149              
  Lines       29569    29569              
==========================================
+ Hits        26330    28610    +2280     
+ Misses       3239      959    -2280     

Flag	Coverage Δ
linux	96.75% <ø> (+7.71%)	⬆️
linux_replay	?

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

Impacted Files	Coverage Δ
synapse/lib/hiveauth.py	96.06% <0.00%> (-0.75%)	⬇️
synapse/lib/trigger.py	93.91% <0.00%> (-0.44%)	⬇️
synapse/lib/types.py	97.48% <0.00%> (+0.18%)	⬆️
synapse/lib/hive.py	98.31% <0.00%> (+0.24%)	⬆️
synapse/lib/certdir.py	97.66% <0.00%> (+0.25%)	⬆️
synapse/datamodel.py	94.76% <0.00%> (+0.62%)	⬆️
synapse/lib/lmdbslab.py	99.60% <0.00%> (+0.68%)	⬆️
synapse/lib/snap.py	95.37% <0.00%> (+0.92%)	⬆️
synapse/tests/utils.py	93.68% <0.00%> (+1.07%)	⬆️
synapse/lib/time.py	98.79% <0.00%> (+1.20%)	⬆️
... and 27 more

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