fix broken WSDL logic

vSphere driver incorrectly assumes that a WSDL is locally required.
A local WSDL is only needed as a work-around for certain situations.

Fixes bug 1171215

Change-Id: Id8c5fc104c244ba768c58b97afdc26703c5c42ac
nova coverage creates lots of empty folders

With nova coverage extension disabled as a default behaviour,
nova will create lots of empty folders under /tmp folder. And also
with each time the nova service reboot, it will create a new
directory with name like nova_coverage_*. There will be number of
the empty folders accumulated.

Patch-Set 3: Rebase for merging code
Fixes: bug 1169005

Change-Id: I26d1037eb66d781ac6ef6b600cca04a709bff3f7
Merge "nova coverage creates lots of empty folders"
Merge "fix broken WSDL logic"
Merge remote-tracking branch 'm_src_repo/citrix-fixes' into build-temp