Fix boto capabilities check

In commit 4845fc27 a capability check for the boto library has been
accidentally broken. boto.connection existed in all versions and it
was HTTPResponse class that should cause the ImportError.
Exception will not happen on the import line anymore, so check the
capabilities using hasattr() instead.

Change-Id: Ic9bff71b91de685a958400f12836322c7ca996c4
lxc: virDomainGetVcpus is not supported by driver

virDomainGetVcpus is not supported by the libvirt lxc
driver, so it results in a nasty traceback. Trap the
error and return the number of vcpus.

Fixes LP: #1106960

Change-Id: I4e81dedad74ce3c58fcdf3ee064dfa0b9aa9a755
Signed-off-by: Chuck Short <chuck.short@canonical.com>
Merge "Fix boto capabilities check"
Merge "lxc: virDomainGetVcpus is not supported by driver"