Add 'contrail-analytics-db' role to the test_sriov suite.

-add 'contrail-analytics-db' role to the test_sriov suite
-add shouldfail for ostf test
 'Check network connectivity from SRIOV instance
  via floating IP'

Change-Id: Ia2d56cec3a1c7bb0c84706adf5c9c711330ed4fa

doc/testing/test_suite_sriov.rst

@@ -73,7 +73,7 @@ Steps
 
     1. Create an environment with "Neutron with tunneling segmentation"
        as a network configuration and CEPH storage
-    2. Enable and configure Contrail plugin
+    2. Enable and configure Contrail plugin with dedicated analytics DB
     3. Deploy cluster with some controller, compute+ceph, compute,
        compute with sriov and contrail-specified nodes
     4. Run OSTF tests
@@ -162,7 +162,7 @@ Steps
 
     1. Create an environment with "Neutron with tunneling segmentation"
        as a network configuration and CEPH+Cinder storage
-    2. Enable and configure Contrail plugin
+    2. Enable and configure Contrail plugin with dedicated analytics DB
     3. Deploy cluster with some controller+ceph, compute+ceph, compute,
        compute with sriov and contrail-specified nodes
     4. Run OSTF tests
@@ -206,7 +206,7 @@ Steps
 
     1. Create an environment with "Neutron with tunneling segmentation"
        as a network configuration and Cinder storage
-    2. Enable and configure Contrail plugin
+    2. Enable and configure Contrail plugin with dedicated analytics DB
     3. Deploy cluster with some controller, controller+cinder, compute+cinder,
        compute, compute with sriov and contrail-specified nodes
     4. Run OSTF tests
@@ -290,7 +290,7 @@ Steps
 
     1. Create an environment with "Neutron with tunneling segmentation"
        as a network configuration and CEPH storage
-    2. Enable and configure Contrail plugin
+    2. Enable and configure Contrail plugin with dedicated analytics DB
     3. Deploy cluster with some controller, compute+ceph,
        compute, compute with sriov and contrail-specified nodes
     4. Run OSTF tests