Enable continuous parsing and add host names to global autoserv.DEBUG entries.

Enabled continuous parsing by passing the server_job object to each machine_worker and then starting a parser on each test execution.

Added the host name to log entries by specifying the host subdirectory on subcommand initialization.

Change-Id: I121d97e0e7e5aa26a1e5f6274797e7e6f1029c16

BUG=None.
TEST=Running tests suites using distribute_across_machines().

Review URL: http://codereview.chromium.org/6837027
2 files changed