Implement ability to update certain properties on objects

[jason-p-pickering]

Lets suppose we want to update some properties of objects, like coordinates of organisation units or zero significance for some data elments, or expiry days for datasets

We could have a file like

uid,objectType,property, new_value
VDBoPPeLee7,organisationUnit,coordinates,[10.123,-56.22]
FTRrcoaog83,dataElement,zeroIsSignificant,true
lyLU2wR22tC ,dataSets,expiryDays,28

dhis2 would then update the requested objects properties if it is possible to do so.