Fix process_config() to work with configparser from six and Python 3.
Fix process_config() to work with configparser from six and Python 3.

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