installer: de-deplux activemq network connectors

Bug 1070747 - de-duplicate connectors on Network of ActiveMQ Brokers
https://bugzilla.redhat.com/show_bug.cgi?id=1070747

From docs bug:
https://bugzilla.redhat.com/show_bug.cgi?id=1066729
Procedure 7.20. To Configure a Network of ActiveMQ Brokers
Links to a broker configuration which uses duplex
NetworkConnectors. These duplex network connectors need only be
configured from the initiating broker, not on both sides of the
connection.
installer: fix connector names

Really trivial, just trying to reduce confusion; the connector for
queues was named "-topics" and vice versa.
Merge pull request #307 from sosiouxme/bug1066729

installer: de-duplex activemq network connectors (bug 1066729)