Implement test command monitor

[okt-osadakov]

This branch is used to add new feature "test" command monitor. The main idea of this feature is to run a common test in parallel with another tests.

For example we can:

• run a stress test in parallel with generic function tests or
• collect statistics on test side using this monitor or
• something else.

To enable this feature we should add <command_monitor> with <script> to package.xml, e.g:

<session>
    <command_monitor>
        <script name="test_monitor"/>
    </command_monitor>
    ...

Testing done:

.../run.sh --cfg=localhost --tester-run=ts/monitors
...
--->>> Starting Logger...done
--->>> Starting RCF...done
--->>> Starting Configurator...done
--->>> Start Tester
Starting package ts
Starting test prologue                        pass
Starting package monitors
Starting test trivial                         pass
Starting test trivial                         pass
Starting test trivial                         pass
Starting test trivial                         pass
Starting test trivial                         pass
Done package monitors pass
Done package ts pass
--->>> Shutdown Configurator...done
--->>> Flush Logs
--->>> Shutdown RCF...done
--->>> Shutdown Logger...done
--->>> Logs conversion...done

Run (total)                               6
  Passed, as expected                     5
  Failed, as expected                     0
  Passed unexpectedly                     1
  Failed unexpectedly                     0
  Aborted (no useful result)              0
  New (expected result is not known)      0
Not Run (total)                         154
  Skipped, as expected                    0
  Skipped unexpectedly                    0

The second test contains the following log:

7	RING	trivial		Self	00:44:15.319	Test iteration #0
8	RING	trivial		Self	00:44:15.319	Sleeping 100 milliseconds: between test iteration
9	RING	test_mon	Self	00:44:15.390	Test iteration #4
10	RING	test_mon	Self	00:44:15.390	Sleeping 100 milliseconds: between test iteration
11	RING	trivial		Self	00:44:15.419	Test iteration #1
12	RING	trivial		Self	00:44:15.419	Sleeping 100 milliseconds: between test iteration
13	RING	test_mon	Self	00:44:15.490	Test iteration #5
14	RING	test_mon	Self	00:44:15.490	Sleeping 100 milliseconds: between test iteration

This log contains two independent Entity Names (one from test another from monitor) with independent test iteration counters.

[ol-dmitryiz]

I am not sure commit log is right for the third commit.

"Currently we have only log messages and syntax to have script node inside
command_monitor node from any package.xml..."

Perhaps you wanted to say that you add support for this new syntax?

[okt-kostik]

Any feedback?