[cwvreg] Fix propertyvalues hot updates When CWProperty instances are touched, the corresponding value gets updated in vreg['propertyvalues'], but their type was ignored.

[pkg] remove useless python >= 3.4 dependency python is python2 is never >= 3.4.

[dataimport/test] fix test failures since 35b29f1eb37a The index name changed, so we need to follow suit.