Add additional plugins to connection tests.

- docker
- libvirt_lxc
- jail

These tests will not run as part of the build, but can be run manually.

test/integration/test_connection.inventory

@@ -12,6 +12,28 @@ chroot-no-pipelining ansible_ssh_pipelining=false
 ansible_host=/
 ansible_connection=chroot
 
+[docker]
+docker-pipelining    ansible_ssh_pipelining=true
+docker-no-pipelining ansible_ssh_pipelining=false
+[docker:vars]
+ansible_host=ubuntu-latest
+ansible_connection=docker
+
+[libvirt_lxc]
+libvirt_lxc-pipelining    ansible_ssh_pipelining=true
+libvirt_lxc-no-pipelining ansible_ssh_pipelining=false
+[libvirt_lxc:vars]
+ansible_host=lv-ubuntu-wily-amd64
+ansible_connection=libvirt_lxc
+
+[jail]
+jail-pipelining    ansible_ssh_pipelining=true
+jail-no-pipelining ansible_ssh_pipelining=false
+[jail:vars]
+ansible_host=freebsd_10_2
+ansible_connection=jail
+ansible_python_interpreter=/usr/local/bin/python
+
 [ssh]
 ssh-pipelining    ansible_ssh_pipelining=true
 ssh-no-pipelining ansible_ssh_pipelining=false
@@ -27,5 +49,8 @@ ansible_host=localhost
 ansible_connection=paramiko_ssh
 
 [skip-during-build:children]
+docker
+libvirt_lxc
+jail
 ssh
 paramiko_ssh