Update oslo-incubator log module

Changes -
 * default connectionpool to WARN log level
 * Backport 'ident' from python 3.3 for Oslo's SysLogHandler
 * remove extra newlines that eventlet seems to add
 * Small edits on help strings
 * Add error type to unhandled exception log message
 * Logging excepthook: print exception info if debug=True
 * Fix spelling errors in comments

Change-Id: I94038cfe875dea27640ae58a598e2692a529dd80
Update oslo-incubator threadgroup module

Changes -
 * Simple typo correction
 * threadgroup: use threading rather than greenthread

Change-Id: Ib7c8dc88e9a4a9936087cfe7938a213d95277fdc
Update oslo-incubator service module

Changes -
 * Simplify launch method
 * service: replace eventlet event by threading

Change-Id: Ia4799eb97bbf1c1da4e90f862f8d09a1cfd986d2
Update oslo-incubator processutils module

Changes -
 * Catch OSError in processutils
 * Fix i18n problem in processutils module

Change-Id: I05672d658a1caf700c1accc597611ca795008ce3
Merge "Update oslo-incubator log module"
Merge "Update oslo-incubator threadgroup module"
Merge "Update oslo-incubator service module"
Merge "Update oslo-incubator processutils module"