securityonion-elastic: add script to disable dark theme in Kibana

[dougburks]

Add a new script called /usr/sbin/so-elastic-configure-kibana-dashboards-light as follows:

#!/bin/bash
#
# Copyright 2014,2015,2016,2017,2018 Security Onion Solutions, LLC
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

cp -av /opt/elastic/src/kibana/dashboards /opt/elastic/src/kibana/dashboards.dark
sed -i 's|\\"darkTheme\\":true|\\"darkTheme\\":false|g' /opt/elastic/src/kibana/dashboards/*.json
so-elastic-configure-kibana-dashboards
rm -rf /opt/elastic/src/kibana/dashboards
mv /opt/elastic/src/kibana/dashboards.dark /opt/elastic/src/kibana/dashboards

[dougburks]

commit:
Security-Onion-Solutions/securityonion-elastic@6cd2644

[dougburks]

Submitted for testing:
https://groups.google.com/d/topic/security-onion-testing/UimOraRDKnc/discussion

[dougburks]

Published:
https://blog.securityonion.net/2018/08/elastic-632-now-available-for-security.html