Bug 1124845 - EAP6 with secured management - confusing error msg when incorrect Truststore Type is set

Now trying to load the truststore/keystore when validating the
connection settings and retun correct message in case of failure
Bug 1069662 - (JON3-16) Adapt JON UI title bar to common Red Hat L&F

keep navbar & main login page styles in separated file - it was not a good
idea to include those into skin_styles.css
Add Mike as developer.
Making the new mashup portlet's scrollbars look relativelly same as the rest of the UI (using the jscrollpane JQuery lib, because there is currently no way to change native scrollbars in FF so we need to use fake ones)
Increasing the height of the scrollpane for the mashup portlet, because I forgot to do that in my previous commit e60acc22d
Bug 1096332 - All content-related workflows broken on Agent

All *ContextImpl classes now lazy load plugin container services

The content subsystem was the only one affected as:
* some of the other managers were created and initialized before the inventory manager
* some of the *ContextImpl classes were already lazy loading the container services
Bug 1096332 - All content-related workflows broken on Agent

Additional commit, some itest classes were broken
Add some logging that would have been helpful investigating bug 1117449.
[1093265] Added some longer button disablement to avoid concurrent updates.
If this "cheap" fix isn't sufficient we'd have to look at something
server-side, and more substantial.