tests: Use parent folder for searching for uncommitted changes

All SSA components (ibssa, ibacm, plugin, tests)
have symbolic linksto sources actually placed out of
component's main folder. configure script searches for
uncommitted changes only under the main folder and doesn't
recognize changes in common source files in "shared" or
"access" folders. As a result, application version
dosen't reflect actual status of source files.
It dosen't have "dirty" status event if
the sources were changed in working directory and not committed.

Signed-off-by: Sasha Kotchubievsky <sashakot@mellanox.com>
Signed-off-by: Hal Rosenstock <hal@mellanox.com>