repoview: make propertycache.setcache compatible with repoview Propertycache used standard attribute assignment. In the repoview case, this assignment was forwarded to the unfiltered repo. This result in: (1) unfiltered repo got a potentially wrong cache value, (2) repoview never reused the cached value. This patch replaces the standard attribute assignment by an assignment to `objc.__dict__` which will bypass the `repoview.__setattr__`. This will not affects other `propertycache` users and it is actually closer to the semantic we need. The interaction of `propertycache` and `repoview` are now tested in a python test file.

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fixbundle() {

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    grep -v 'saving bundle' | grep -v 'saved backup' | \

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        grep -v added | grep -v adding | \

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        grep -v "unable to find 'e' for patching" | \

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        grep -v "e: No such file or directory"

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}