Alter log level for "removing file" messages

[atc0005]

Example output from a recent live run against a Tomcat 7 log directory:

INFO[0000] Removing file                                 file=/var/log/tomcat7/old/localhost_access_log.2019-06-14.txt-20190615.bz2 removal_enabled=true
INFO[0000] Removing file                                 file=/var/log/tomcat7/old/localhost_access_log.2019-06-15.txt-20190616.bz2 removal_enabled=true
INFO[0000] Removing file                                 file=/var/log/tomcat7/old/localhost_access_log.2019-06-16.txt-20190617.bz2 removal_enabled=true
INFO[0000] Removing file                                 file=/var/log/tomcat7/old/localhost_access_log.2019-06-17.txt-20190618.bz2 removal_enabled=true
INFO[0000] Removing file                                 file=/var/log/tomcat7/old/localhost_access_log.2019-06-18.txt-20190619.bz2 removal_enabled=true
INFO[0000] Removing file                                 file=/var/log/tomcat7/old/localhost_access_log.2019-06-19.txt-20190620.bz2 removal_enabled=true
INFO[0000] Removing file                                 file=/var/log/tomcat7/old/localhost_access_log.2019-06-20.txt-20190621.bz2 removal_enabled=true
INFO[0000] Removing file                                 file=/var/log/tomcat7/old/localhost_access_log.2019-06-21.txt-20190622.bz2 removal_enabled=true
INFO[0000] Removing file                                 file=/var/log/tomcat7/old/localhost_access_log.2019-06-22.txt-20190623.bz2 removal_enabled=true
INFO[0000] Removing file                                 file=/var/log/tomcat7/old/localhost_access_log.2019-06-23.txt-20190624.bz2 removal_enabled=true
INFO[0000] Removing file                                 file=/var/log/tomcat7/old/localhost_access_log.2019-06-24.txt-20190625.bz2 removal_enabled=true
INFO[0000] 1576 files successfully removed
INFO[0000] localhost_access_log.2015-04-23.txt-20160906.bz2  failed_removal=false
INFO[0000] localhost_access_log.2015-04-24.txt-20160906.bz2  failed_removal=false
INFO[0000] localhost_access_log.2015-04-25.txt-20160906.bz2  failed_removal=false
INFO[0000] localhost_access_log.2015-04-26.txt-20160906.bz2  failed_removal=false

I don't yet know the best way to handle listing/logging the latter items showing what did occur, but logging what was going to occur seems like duplicate information based on the default INFO log level.

A good first start here would be setting the former log messages to DEBUG level so that they're muted by default. The X files successfully removed message would explicitly remain INFO level and the latter messages better evaluated as part of the work on #72.

[atc0005]

Note: Will likely need to update the example log output snippets and perhaps the screenshots as well.

[atc0005]

Note: Will likely need to update the example log output snippets and perhaps the screenshots as well.

Those samples are not tied to an example that uses the --remove option, so those samples are fine as-is.