DIS-224: Change backup cron job to use mydumper

This commit changs the default backup script to use mydumper.

Test Plan:
1) Set up a new instance of Aspen using createSite.php
2) Note the cron file uses myDumper for backups now!

Author: kylemhall

sites/template.linux/conf/crontab_settings.txt

@@ -38,7 +38,7 @@
 # MySQL Nightly Dump #
 ######################
 # backup important bits at 12:10am daily
-10 0 * * *    root    php /usr/local/aspen-discovery/code/web/cron/backupAspen.php {sitename}
+10 0 * * *    root   rm /data/aspen-discovery/{sitename}/sql_backup/mydumper/* && php /usr/local/aspen-discovery/code/web/cron/backupAspen-mydumper.php {sitename}
 
 #############################################
 # New York Times Best seller Lists Updating #
@@ -97,4 +97,4 @@
 ######################################
 # Run Clam AV Scans                  #
 ######################################
-00 3 * * * root truncate -s0 /var/log/aspen-discovery/clam_av.log; /bin/clamscan --recursive=yes --quiet -i --exclude-dir=/var/lib/mysql --exclude-dir=/sys --exclude-dir=/data/aspen-discovery/{sitename}/solr7/ --exclude-dir=/var/log/aspen-discovery/{sitename} --exclude-dir=/data/aspen-discovery/{sitename}/covers/small --exclude-dir=/data/aspen-discovery/{sitename}/covers/medium --exclude-dir=/data/aspen-discovery/{sitename}/covers/large --log=/var/log/aspen-discovery/clam_av.log
+00 3 * * * root truncate -s0 /var/log/aspen-discovery/clam_av.log; /bin/clamscan --recursive=yes --quiet -i --exclude-dir=/var/lib/mysql --exclude-dir=/sys --exclude-dir=/data/aspen-discovery/{sitename}/solr7/ --exclude-dir=/var/log/aspen-discovery/{sitename} --exclude-dir=/data/aspen-discovery/{sitename}/covers/small --exclude-dir=/data/aspen-discovery/{sitename}/covers/medium --exclude-dir=/data/aspen-discovery/{sitename}/covers/large --log=/var/log/aspen-discovery/clam_av.log