Remove ConfigAdmin subsystem

It was only used as part of OSGI but we removed osgi from codbase some time ago.
Test cases for WFLY-2739
Test cases for WFLY-2739
WFLY-2784 Allow the MyFaces implementation module to access the "META-INF/**" path from the javax.faces.api dependency
[WFLY-1523] Introduce caching for LDAP access by security realms for user searching, caching validated passwords and caching the results of group searches.
[WFLY-1523] Some minor modifications following code review of the LDAP cache implementation.
[WFLY-1848] Enable the loading of the users actual username from LDAP.

This allows a different username to be discovered compared to the one supplied by the user.
Merge pull request #5883 from darranl/WFLY-2848_2

[WFLY-2848] A new option to allow the users username to be re-loaded from LDAP in the management realms.
Merge pull request #5838 from petrandreev/WFLY-2739

WFLY-2739: BeanDeploymentArchive for external (WFLY) modules added twice
Merge pull request #5873 from fjuma/WFLY-2784

WFLY-2784 Allow the MyFaces implementation module to access the "META-INF/**" path from the javax.faces.api dependency
Merge pull request #5820 from ctomc/cleanup

OSGi leftovers - Remove ConfigAdmin subsystem
Merge pull request #5884 from bstansberry/ds.xml-override

[WFLY-2880] Use the override MRR for deployment ds statistics
Update to Undertow CR5
Merge pull request #5885 from n1hility/update-undertow

Update to Undertow CR5
Refactor single sign-on implementation in org.wildfly.clustering.web.spi/infinispan modules.
Implement distributable SSO support for Undertow.
Upgrade Undertow to 1.0.0.CR3
Initial subsystem work for single sign on
Drop superfluous re-authenticate attribute of <single-sign-on/>.
Use a constant for single-sign-on resource/path.
Add Lifecycle support to SingleSignOnManager.
Create SingleSignOnManagerService that properly invokes the lifecycle methods of the SingleSignOnManager.
Integrate support for distributable SingleSignOnManager.
Unregister the authentication mechanism with the host on SingleSignOnService.stop(...).
<single-sign-on domain="..."/> attribute should be required.