SM-2345: Add managed dependency for activemq-client
SM-2320: Upgrade to Karaf 2.3.6
SM-2354: Upgrade to maven-bundle-plugin 2.5.0

(Cherry picked from the commit 0e378d12b9350a0b01922ccd8eeb0d6e1ae5d42d)
SM-2359: Upgrade to Pax Exam 4.1.0

(Cherry picked from the commit 0956427da0045298476e350410738771b5e0c593)