Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=54974
Merged revision 1482720 from tomcat/trunk:
SessionCookieConfig.setXXX methods will throw IllegalStateException if the ServletContext from which this SessionCookieConfig was acquired has already been initialized.


git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1482782 13f79535-47bb-0310-9956-ffa450edef68