Update mule-transports-http to support tomcat 6, 7, and 8

mule-transports-http depends on EOL tomcat 5.5.23 for cookie processing.
Tomcat changed the method signature and moved the class from tomcat-util
to coyote starting with tomcat 6.  This prevents usage with more modern
tomcat versions.

This fix upgrades it to support tomcat 6, 7, and 8 by using the new api
introduced in tomcat 6 and using the already supported tomcat 6 version
already in mule using ${tomcatVersion}.  Tomcat 5 will no longer be
supported.

Verified working in tomcat 6, 7, and 8.  Defaulted httpOnly to false until
mule has upgraded http transports to support httpClient 4.x.

Additionally, no need to have an exclusion on commons-logging as tomcat uses
tomcat-juli bundled version of commons-logging loaded in separate classloader
and using different path in order to avoid conflicts with projects using their
own commons-logging.  Therefore the dependency no longer exists.