SRADA-772: Implemented save trace functionality in DA CLI.

SRADA-772: Implemented save trace functionality in DA CLI.

* CliInternals.saveTrace() - new method.
* StopCommand.processCommandInternal() - fixed to print correct output path.
* TracingProcessManager.createTracingProcess() - set output file name as an
argument for starting new tracing process.
* TracingProcess.saveTrace() - new method.
* TracingProcess.performAllTasks() - do saving trace and check its result
before return.
* Project.init() - extracted the filename construction to the separate
public static method constructSaveName() to be reusable in CLI.
* TracingProcessCommunicationTest.interruptCommunication() - test fixed to
stub saveTrace with true result.

Change-Id: I6e940ca97caf137bd74ca8efaf54904384a357c8