Added new feature to OpenNaaS called opennaas-spring-security based
on spring, spring-web, spring-dm and spring-dm-web features,
spring-security bundles and new opennaas-core-security bundle.

Created new opennaas-core-security bundle to publish a security filter
based on Spring Security using Spring DM.

Updated all the REST WS publications: Abstract Capability, Resource
Manager, Protocol Session Manager and vCPE Network Manager to require
new security filter.
Merge branch 'develop' of git://github.com/dana-i2cat/opennaas into feature/security
Change opennaas-core-security version from 0.19-SNAPSHOT to
0.20-SNAPSHOT after merging from upstream/develop in new version.
Simplified pom.xml of opennaas-core-security
Updated OpenNaaS Core Security bundle to include persistence
configuration (using HSQLDB) and SecurityRepository. Now it only
initializes Spring Security ACLs SQL Schema.

Now OpenNaaS Core Security bundle is packaged as mandatory bundle of
OpenNaaS loaded after OpenNaaS Core Persistence bundle and before
OpenNaaS Core Resources bundle.
Merge pull request #592 from logoff/feature/security

Feature/security