Fix XSS vulnerability in Continuum

Initial fix for this was implemented in http://jira.codehaus.org/browse/REDBACK-275 (included in 1.2.7)

Latest community issue in Redback for this issue http://jira.codehaus.org/browse/REDBACK-276

Will be revising the validation used in every actions in the continuum to prevent invalid inputs like possible XSS attacks. I will just attach my patch after I'm done.

Will be adding additional validation for every action class' validation.xml and will be using regex to check if the user's input is not a possible XSS attack.

r1091669

• use c:out and fn:escapeXml in JSPs

removed fn:escapeXml in r1091974

removed c:out inside <input> tags in r1091990

r1091993

• prevent xss attacks in build agent, local repository and purge configuration

patch added for XSS vulnerability fixes with UT and Selenium Script

Applied patch in r1096681 with some modifications:

• fixed validations in project group action and build definition action
• fixed selenium scripts

r1097686

• move validation to xml files
• remove regex validation for description and just escape xml

TODO:
add validation to prevent xss attacks in xmlrpc

r1101338

• added validation in xmlrpc
• fixed validation of artifactid in ConfigureAppearanceAction
• removed regex validation of build agent description

r1101669

• Merge changes in trunk to 1.3.x branch

r1102231

• added ${} for allowed characters in build definition's arguments

r1102234

• merge to 1.3.x branch