Missing javax.servlet.api dependency in org.jasig.cas.client module

Issue

• When trying to use the cas-client-core-3.2.1.jar of /modules/system/layers/gatein/org/jasig/cas/client/main/ in an application by defining dependency in the jboss-deployement-structure.xml file, a java.lang.ClassNotFoundException exception is thrown for the missing dependency of javax.servlet.http.HttpSessionListener in the cas-client-core-3.2.1.jar

10:48:12,740 WARN  [org.jboss.modules] (MSC service thread 1-8) Failed to define class org.jasig.cas.client.session.SingleSignOutHttpSessionListener in Module "org.jasig.cas.client:main" from local module loader @1e845c2 (finder: local module finder @3c0007 (roots: C:\Java\jboss-jpp-6.1.0\modules,C:\Java\jboss-jpp-6.1.0\modules\system\layers\gatein,C:\Java\jboss-jpp-6.1.0\modules\system\layers\base)): java.lang.LinkageError: Failed to link org/jasig/cas/client/session/SingleSignOutHttpSessionListener (Module "org.jasig.cas.client:main" from local module loader @1e845c2 (finder: local module finder @3c0007 (roots: C:\Java\jboss-jpp-6.1.0\modules,C:\Java\jboss-jpp-6.1.0\modules\system\layers\gatein,C:\Java\jboss-jpp-6.1.0\modules\system\layers\base)))
...
...
Caused by: java.lang.NoClassDefFoundError: javax/servlet/http/HttpSessionListener
    at java.lang.ClassLoader.defineClass1(Native Method) [rt.jar:1.6.0_45]
...
...
Caused by: java.lang.ClassNotFoundException: javax.servlet.http.HttpSessionListener from [Module "org.jasig.cas.client:main" from local module loader @1e845c2 (finder: local module finder @3c0007 (roots: C:\Java\jboss-jpp-6.1.0\modules,C:\Java\jboss-jpp-6.1.0\modules\system\layers\gatein,C:\Java\jboss-jpp-6.1.0\modules\system\layers\base))]
    at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:196) [jboss-modules.jar:1.2.2.Final-redhat-1]