[KARAF-3288] Support unset JAVA_HOME on Solaris

    This closes #49

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commit 72af704dc0ffa5c3540153df9c599b66551c93bf
Author: Kevin Earls <kevin@kevinearls.com>
Date:   2014-10-15T11:56:35Z

    KARAF-3288 Update script to correctly set JAVA_HOME on Solaris

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Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/karaf
[KARAF-3281] Upgrade to Pax Logging 1.8.0 (with log4j v2 support)
[KARAF-3322] Upgrade to exec-maven-plugin 1.3.2