Description of problem:
The tomcat script provided with rhel-7 tomcat should be updated to utilize the systemd unit instead of it's own logic to start tomcat (which is broken).

Version-Release number of selected component (if applicable):
tomcat-7.0.69-4.el7.noarch

How reproducible:
Every time.

Steps to Reproduce:
1. yum install tomcat
2. `tomcat start` to observe the failure

Actual results:
# tomcat start
/usr/sbin/tomcat: line 21: .: /etc/sysconfig/: is a directory
/usr/sbin/tomcat: line 39: /logs/catalina.out: No such file or directory
# tomcat version
/usr/sbin/tomcat: line 21: .: /etc/sysconfig/: is a directory
Server version: Apache Tomcat/7.0.69

Expected results:
The service should start correctly/display correct version information without a warning.

Additional info:
The wrapper from upstream can be slightly modified to work well here: http://pkgs.fedoraproject.org/cgit/rpms/tomcat.git/tree/tomcat-8.0.wrapper