Add integration test suite

Add integration test suite

This is the beginning of porting udisks1's "tests/run" integration test suite.
When running the suite from the source tree, this tests the daemon and library
from source tree; falls back on the installed system ones otherwise.

Currently covered are:

 - Creation and label handling on all supported file systems (including swap
   and empty)
 - cleanup after drive removal without unmount
 - UDisksDrive properties
 - picks up changes from command line tools like mkfs
 - correct file/dir/mountpoint permissions
 - SMART