Setting the file mode for the graylog2-web-interface init script to 755 in graylog2-web-interface.spec

This was missed when re-organizing the install and files sections
of this file, but when this package was updated to a new version
the init script was also updated with mode 0644. At least 0755
is required.
Removing the sleep command from the start function of SOURCES/init.d-graylog2-server

https://github.com/corey-hammerton/graylog2-rpms/issues/1

Since the native starup process of the graylog2 package family has
improved during the preview and now release candidate releases there
is no reason to have port testing or waiting at the init script
startup level. So removing the sleep command from the start function.

Adding a sleep command to the restart function. When attempting to
run a simple stop and start within the script the logs state that
a required port is already in use. By adding a sleep command, this
waits for 5 seconds which may be a little excessive, to the restart
will give the java service a chance to shutdown cleanly before
attempting to start it up again.

At the beginning of the script, if the java command is not found
exit the script with an exit code of 1. With a recent java upgrade
and I forgot to update the configuration file with the new path
before restarting the system the init script did see that the JAVA_CMD
path was not executable and displayed a failure, but still continued.
The exit with code 1 will prevent future issues of this sort.
Merge branch 'master' into issue2
Adding an initial working log4j configuration to the main tree.

The primary appender in SOURCES/log4j-graylog2-server.xml is now
a DailyRollingFileAppender to write log entries to the file
/var/log/graylog2/server.log which is rotated everyday at midnight.

Uncommenting the ADDITIONAL_JAVA_OPTS variable in
SOURCES/sysconfig-graylog2-server in order to import the new log4j
configuration file in the graylog2-server service. It's content is
"-Dlog4j.configuration=file:///etc/graylog2/log4j-graylog2-server.xml"

Removing the stdout-to-file bash redirection in SOURCES/init.d-graylog2-server,
since the log4j configuration doesn't output to System.out/stdout
anymore.

Adding and installing a new source in SPECS/graylog2-server.spec,
source 4, for the log4j configuration file.