* activate knoplerfish OSGi for testing
* do not assume URL.openstream is NOT null - happens with knoplerfish-osgi framework
Merge branch 'jruby-1_7' of github.com:jruby/jruby into jruby-1_7
removed the hardcoded version from test script for jboss-wildfly

the wildfly maven plugin installs wildfly which apparently uses
some version ranges which can change over time. the test script
needs to find the place where the plugin installs wildfly instead
of hardcoded location.
some minor improvements on URLResource
add helper methods for IsolatedScriptingContainer for OSGi

add methods to add an OSGi bundle to the $LOAD_PATH or Gem::Specifiction.dirs.
fix IllegalArgumentException for an exotic classloader