Restart warnings (especially about memory leaks) showing up in catalina.out log.

[kfogel]

When I do mvn tomcat7:redeploy, I get stuff like this in /var/lib/tomcat7/logs/catalina.out:

Jul 15, 2016 3:44:49 PM org.apache.catalina.startup.HostConfig undeploy
INFO: Undeploying context [/openhmis]
Jul 15, 2016 3:44:49 PM org.apache.catalina.loader.WebappClassLoaderBase clearReferencesJdbc
SEVERE: The web application [/openhmis] registered the JDBC driver [com.mysql.jdbc.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
Jul 15, 2016 3:44:49 PM org.apache.catalina.loader.WebappClassLoaderBase clearReferencesThreads
SEVERE: The web application [/openhmis] appears to have started a thread named [Abandoned connection cleanup thread] but has failed to stop it. This is very likely to create a memory leak.
Jul 15, 2016 3:44:49 PM org.apache.catalina.loader.WebappClassLoaderBase clearReferencesThreads
SEVERE: The web application [/openhmis] appears to have started a thread named [pool-2-thread-1] but has failed to stop it. This is very likely to create a memory leak.
Jul 15, 2016 3:44:49 PM org.apache.catalina.loader.WebappClassLoaderBase checkThreadLocalMapForLeaks
SEVERE: The web application [/openhmis] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@40e5c9f4]) and a value of type [org.hibernate.internal.SessionImpl] (value [SessionImpl(<closed>)]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.
Jul 15, 2016 3:44:49 PM org.apache.catalina.startup.HostConfig deployWAR
INFO: Deploying web application archive /var/lib/tomcat7/webapps/openhmis.war
Jul 15, 2016 3:44:50 PM org.apache.catalina.startup.TldConfig execute
INFO: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
Jul 15, 2016 3:44:50 PM org.apache.catalina.startup.HostConfig deployWAR
INFO: Deployment of web application archive /var/lib/tomcat7/webapps/openhmis.war has finished in 1,175 ms