Upgrade LICENSE file mentioning 3rd party software

LICENSE file doesn't mention any 3rd party software that is included in the release:

- ./profile/src/main/java/org/apache/karaf/profile/command/ProfileChangeParents.java

- ./webconsole/instance/src/main/java/org/apache/karaf/webconsole/instance/InstancePlugin.java

- ./shell/console/src/main/java/jline/internal/Preconditions.java

- ./shell/console/src/main/java/jline/console/completer/Completer.java

• ./shell/core/src/main/java/org/apache/karaf/shell/support/converter/ReifiedType.java/specs/java.xml/src/main/java/org/w3c/dom/ElementTraversal.java

-  ./util/src/main/java/org/apache/karaf/util/maven/Parser.java