Integrate spring-security in opennaas distribution.

To check integration is successful, I've been using sample in following url:
https://issues.apache.org/jira/browse/KARAF-785?focusedCommentId=13079628&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13079628

Notice opennaas-spring-security and war features have to be installed at boot time in order for the distribution to work properly.
GRE tunnel ipv6.
Integration test for GRETunnel ipv6 and fixed template error.
Fixed errors in parser and commands.
Fix error in test.
Added decription to createTunnel command.
Delete GRE tunnel test ignored, since Mock Resources does not contain GRE configuration.
Test commented since Mock Router does not contain gre information.
Updated wrong comment on command.
CheckParams restriction removed from deleteTunnelAction, since it needs dirty model.
HostedService added to test, so it would pass after implementing dirty model too.
Static Route capability, action and command.
Tests for static route templates.
Static Route ipv6 template fixed.
Delete Static Route command adapted to new IP syntax
Capability error in depcrecated methods fixed.
Tests for configureBGP junos actions using ipv4 and ipv6.

Added feature in BGPModelFactory for setting session description with value read from properties.
Removed war from OpenNaaS boot features. Removed Taglibs bundle from
opennaas-spring-security feature.
Merge pull request #578 from isartcanyameres/feature/spring-security

Removed war from OpenNaaS boot features. Removed Taglibs bundle from
Merge pull request #574 from isartcanyameres/feature/gre-ipv6

Feature/gre ipv6