Added information message before invoking test_runner from ACK CLI.
test_name tag is generated when ACK is initiated.

test_name tag was generated when test has finished. Now it is generated
when ACK is creating test_run.conf and updated when test method finishes.
Sync file system before crash

In Crashdump test, perform sync file system before it crash the host.
Merge pull request #83 from bpwook/logrotate_fix

Added information message before invoking test_runner from ACK CLI.
Merge pull request #85 from bpwook/models

test_name tag is generated when ACK is initiated.
Merge pull request #86 from bpwook/crashdump

Sync file system before crash