update dimension index
fix format of datetime strings sent down during OTA restore

not sure if this causes other problems,
but the date format here was just from calling unicode on a datetime
which seems unintenional
Merge pull request #4594 from dimagi/dimension3

update dimension index
Merge pull request #4595 from dimagi/dynamic_properties

fix format of datetime strings sent down during OTA restore
update WAR to use ES Query classes
use dict comprehension
remove unused import
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