Update allowed failures
Update allowed failures

Remove cross-compilation task as Travis bug is not manifesting.

Add all Python-related tasks, since they use 3.4 and 3.4 no longer seems to
be available on Travis. They use 3.4 in order to install dbus-python easily.
Some other solution may be necessary.

Signed-off-by: mulhern <7b51bcf507bcd7afb72bf8663752c0ddbeb517f6@redhat.com>

stratis-storage/stratisd,stratis-storage/stratisd,trgill/stratisd,stratis-storage/stratisd,trgill/stratisd