Removed distributed option (-n4) form py.test config so it can run even without xdist.
Removed distributed option (-n4) form py.test config so it can run even without xdist.

m42e/jira,jameskeane/jira-python,systemadev/jira-python,coddingtonbear/jira,tsarnowski/jira-python,awurster/jira,tsarnowski/jira-python,rayyen/jira,m42e/jira,akosiaris/jira,kinow/jira,milo-minderbinder/jira,kinow/jira,stevencarey/jira,rayyen/jira,dbaxa/jira,dwmarshall/pycontribs-jira,systemadev/jira-python,milo-minderbinder/jira,awurster/jira,stevencarey/jira,pycontribs/jira,VikingDen/jira,pycontribs/jira,dwmarshall/pycontribs-jira,dbaxa/jira,jameskeane/jira-python,akosiaris/jira,VikingDen/jira,coddingtonbear/jira