Nearly a hundred Portland-area janitors and their allies demonstrated today outside M Financial Plaza and the Whole Foods Building, two office buildings in the Pearl District’s Brewery Blocks. The workers were protesting that the buildings’ owner, JPMorgan Asset Management – a subsidiary of JPMorgan which includes the largest bank in the U.S. – is using a non-union janitorial company with a history of violating workers’ rights.  The union janitors first sounded the alarm about this decision in the fall when local property manager Arke Management decided to dump the union janitors who had long cleaned the buildings. After weeks of outreach by SEIU Local 49 and the community to Arke…