Configure the numeric type of the EfficacyIndicator value to use Float.
Add a new column named data and deprecate the existing value columen.
With the current model, value will use the default scale of the
Decimal type of mysql, which in some enviornments is 0.
This change also adds a test with mysql as backend to reproduce the
issue, since the existing tests using sqlite do not reproduce the
problem, as well as some simple migration tests.
Closes-Bug: #2103458
Change-Id: Ib281fa32e902d2181449091f493d6506b5199094
0ed3d4de83