Thank you for your report.
This looks like a local configuration problem, rather than a bug in
Ubuntu. Specifically it looks like you have manually deleted
/etc/tomcat7/ and consequently the package is expected to fail.
You can find pointers to get help for this sort of problem here:
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: tomcat7 (Ubuntu)
Status: New = Confirmed
--
You received this bug notification because you are a member of Ubuntu
Server Team, which is subscribed to tomcat7 in Ubuntu.
** Tags removed: need-duplicate-check
--
You received this bug notification because you are a member of Ubuntu
Server Team, which is subscribed to tomcat7 in Ubuntu.
https://bugs.launchpad.net/bugs/1410734
Title:
package tomcat7 7.0.52-1ubuntu0.1 failed to install/upgrade:
subprocess