[KARAF-4157] Provide system script templates to start karaf without service wrapper

[lburgazzoli]

I've created a set of templates to start Karaf without service wrapper:

• karaf-service-template.conf
• karaf-service-template.init-debian
• karaf-service-template.init-redhat
• karaf-service-template.solaris-smf
• karaf-service-template.systemd

An helper script to generate a service file according to the operating system has been provided:

• karaf-service.sh

Example:

$ ./karaf-service.sh -h
    USAGE: ./karaf-service.sh [-f KARAF_SERVICE_PATH] [-d KARAF_SERVICE_DATA] [-p KARAF_SERVICE_PIDFILE] [-n KARAF_SERVICE_NAME] [-e KARAF_ENV, ...]
            -k KARAF_SERVICE_PATH     # Karaf installation path
            -d KARAF_SERVICE_DATA     # Karaf data path (default to ${KARAF_SERVICE_PATH}/data)
            -c KARAF_SERVICE_CONF     # Karaf configuration file
            -t KARAF_SERVICE_ETC      # Karaf etc path (default to ${KARAF_SERVICE_PATH/etc}
            -p KARAF_SERVICE_PIDFILE  # Karaf pid path (default to ${KARAF_SERVICE_DATA}/${KARAF_SERVICE_NAME}.pid)
            -n KARAF_SERVICE_NAME     # Karaf service name (default karaf)
            -e KARAF_ENV              # Karaf environment variable (can be repeated)
            -u KARAF_SERVICE_USER     # Karaf user
            -g KARAF_SERVICE_GROUP    # Karaf group (default ${KARAF_SERVICE_USER)
            -l KARAF_SERVICE_LOG      # Karaf console log (default to ${KARAF_SERVICE_DATA}/log/${KARAF_SERVICE_NAME}-console.log)
            -f KARAF_SERVICE_TEMPLATE # Template file to use
            -h                        # this usage message

$./karaf-service.sh -k /opt/apache/karaf-4.0.3 -n my-karaf-service -e JAVA_HOME=$JAVA_HOME -u myuser
``

[lburgazzoli]

With commit 6ee29e1 I've added a new command to bin/karaf : daemon.

This command sets KARAF_EXEC=exec and exits the script when karaf terminates