/usr/share/java/tomcat-servlet-api-3.0.jar is in libservlet3.0-java 7.0.56-3+deb8u11.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/java/servlet-api-3.0.jar
/usr/share/java/servlet-api-3.0.jar