blktap2: Redirect VBD pause events to sm/blktap.py
blktap2: Redirect VBD pause events to sm/blktap.py

Delegate blkback uevent handling to sm/blktap2.py, a drop-in
replacment for scripts/block.

Once blktap2 is enabled, the new module additionally manages
pause/resume for all tapdisk2 nodes. A VBD.pause/resume then will
pause/resume the tapdev node accordingly.

Signed-off-by: Daniel Stodden <05f14ed2a2851619d24030f51bb8d7a9bac70353@citrix.com>

vasilenkomike/xen-api,simonjbeaumont/xen-api,vasilenkomike/xen-api,koushikcgit/xen-api,thomassa/xen-api,huizh/xen-api,simonjbeaumont/xen-api,ravippandey/xen-api,djs55/xen-api,srowe/xen-api,robertbreker/xen-api,cheng--zhang/xen-api,Frezzle/xen-api,robertbreker/xen-api,guard163/xen-api,anoobs/xen-api,cheng-z/xen-api,jjd27/xen-api,djs55/xen-api,euanh/xen-api,huizh/xen-api,djs55/xen-api,euanh/xen-api,vasilenkomike/xen-api,simonjbeaumont/xen-api,vasilenkomike/xen-api,vasilenkomike/xen-api,anoobs/xen-api,anoobs/xen-api,huizh/xen-api,djs55/xen-api,koushikcgit/xen-api,cheng--zhang/xen-api,cheng-z/xen-api,ravippandey/xen-api,cheng-z/xen-api,salvocambria/xen-api,euanh/xen-api,srowe/xen-api,cheng-z/xen-api,euanh/xen-api,cheng--zhang/xen-api,jjd27/xen-api,huizh/xen-api,guard163/xen-api,robertbreker/xen-api,robertbreker/xen-api,huizh/xen-api,srowe/xen-api,simonjbeaumont/xen-api,djs55/xen-api,guard163/xen-api,agimofcarmen/xen-api,agimofcarmen/xen-api,robertbreker/xen-api,srowe/xen-api,koushikcgit/xen-api,jjd27/xen-api,salvocambria/xen-api,agimofcarmen/xen-api,cheng--zhang/xen-api,jjd27/xen-api,cheng--zhang/xen-api,guard163/xen-api,koushikcgit/xen-api,anoobs/xen-api,agimofcarmen/xen-api,cheng--zhang/xen-api,rafalmiel/xen-api,jjd27/xen-api,euanh/xen-api,cheng-z/xen-api,salvocambria/xen-api,simonjbeaumont/xen-api,rafalmiel/xen-api,ravippandey/xen-api,agimofcarmen/xen-api,cheng-z/xen-api,thomassa/xen-api,euanh/xen-api,djs55/xen-api,agimofcarmen/xen-api,ravippandey/xen-api,guard163/xen-api,cheng-z/xen-api,srowe/xen-api,jjd27/xen-api,rafalmiel/xen-api,rafalmiel/xen-api,Frezzle/xen-api,guard163/xen-api,koushikcgit/xen-api,anoobs/xen-api,koushikcgit/xen-api,huizh/xen-api,Frezzle/xen-api,thomassa/xen-api,rafalmiel/xen-api,cheng--zhang/xen-api,thomassa/xen-api,anoobs/xen-api,salvocambria/xen-api,salvocambria/xen-api,salvocambria/xen-api,robertbreker/xen-api,simonjbeaumont/xen-api,Frezzle/xen-api,vasilenkomike/xen-api,thomassa/xen-api,Frezzle/xen-api,ravippandey/xen-api,rafalmiel/xen-api,thomassa/xen-api,ravippandey/xen-api