The bug fixed in !1370 was due to a reuse of the per app anti features
dictionary in the per version one and adding the per version anti
features into it. This was not caught by the test suite as the app
versions are processed from newest to oldest and the test data had only
anti features in the oldest version. This patch adds an anti feature to
a newest version so only those in between should not have it.
make_v0() modified the apps data structure to copy an anti feature for a
specific version to all versions resulting in index-v1 and -v2 to
contain wrong anti feature annotations. This patch fixes this and adds a
test that the data structure is no longer modified.
The bug shadowed bugs in the AF implementation of -v1 and -v2 resulting
in not coping the version specific data. This is corrected as well.
This is also tested now.
For -v2 the AF dict is now sorted to make the result reproducible.
Finally The NoSourceSince AF was added as a per version and overall AF
in -v1 and is now only applied as an overall AF and the test is updated
accordingly.
