Refactor IAM templates (part 2)

[hborisoff]

What	Where/Who
JIRA Issue	SDK-71
People Involved	@hborisoff

Background

• Moved most of the 'defineAction' code to MessageTemplates.java and did leave only 'createActionArgs' and 'showMessage' methods per message instead of the 'register' method.
• Introduced MessageTemplateConstants.java to reduce the size of MessageTemplates.java.
• Renamed the message classes to be distinguishable enough from the other classes in the package (HTMLTemplate becomes RichMessage, OpenURL becomes OpenUrlAction, appended 'Message' suffix to the other messages)

[hborisoff]

AndroidSDK/out.map - this file needs to be removed from the repository and added to .gitignore. Will do it in another PR.