The REST interface for security domain has been refactored and
configured such that it requires authentication. A CLI has been
added to get an installation token.

Ticket #309

The current ROOT webapp will redirect users coming to the root
URL path to the proper path of the subsystem's webapp.

Since now a single Tomcat instance may have multiple subsystems,
a new ROOT webapp has been added to present the user with a menu
of all available webapps from all subsystems in the instance.

Ticket #89

CMS engine is a singleton and it's used by PKI realm to authenticate
users accessing the subsystem. Since a Tomcat instance may contain
multiple subsystems, each having separate realm, the PKI JAR links
need to be moved into WEB-INF/lib so that they will run inside
separate class loaders.

Tomcat also requires that the authenticator and realm classes be
available in common/lib. To address this a new package pki-tomcat.jar
has been added. The package contains the authenticator and a proxy
realm. When the subsystems start running, they will register their
own realms into the proxy realms such that the authentications will
be forwarded to the appropriate subsystems.

Ticket #89

The SSL connection has been configured with clientAuth="want" so
users can choose whether to provide a client certificate or username
and password. The authentication and authorization will be handled
by the SSL authenticator with fallback and PKI realm. New access
control rules have been added for users, groups, and certs REST
services.

Ticket #107

To support different access control configurations the REST
services have been separated by roles. Services that don't
need authentication will be available under /rest. Services
that require agent rights will be available under /rest/agent.
Services that require admin rights will be available under
/rest/admin.

Ticket #107

* Integration of Tomcat 7
* Introduction of dependency upon tomcatjss 7.0
* Removal of http filtering configuration mechanisms
* Introduction of additional slot substitution to
  support revised filesystem layout
* Addition of 'pkiuser' uid:gid creation methods
* Inclusion of per instance '*.profile' files
* Introduction of configurable 'configurationRoot'
  parameter
* Introduction of default configuration of 'log4j'
  mechanism (alee)
* Modify web.xml to use new Application classes to
  bootstrap servers (alee)
* Introduction of "Wrapper" logic to support
  Tomcat 6 --> Tomcat 7 API change (jmagne)
* Added jython helper function to allow attaching
  a remote java debugger (e. g. - eclipse)

Installation code common to the panels and the installation servlet are extracted to a
ConfigurationUtils file.  The panel code will be cleaned up to use the code in this
class in a later commit.

Contains restful client and test driver code.  The test driver code should be modified
and placed in a junit/system test framework.  Installation has been tested to work with
the following installations: master CA, clone CA, KRA, OCSP, TKS, subordinate CA, CA
signed by external CA (parts 1 and 2).

Ticket #155

Previously the source code was located inside a pki folder.
This folder was created during svn migration and is no longer
needed. This folder has now been removed and the contents have
been moved up one level.

Ticket #131