PROTON-685: iterate on a copy of the values to prevent CME after the child free() calls  modifies the map

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1625043 13f79535-47bb-0310-9956-ffa450edef68
NO-JIRA: add ignore for Eclipse PyDev plugin project config

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1625044 13f79535-47bb-0310-9956-ffa450edef68
PROTON-651: remove the extraineous 'PN_' if under the proton namespace.

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1625048 13f79535-47bb-0310-9956-ffa450edef68