teststeps: Improvements and bugfixing of teststeps

This patch introduces several improvements and small bugfixes
of teststeps. These changes were identified during implementation
of OVS/DPDK regression tests.

Patch content:
* teststeps: step aliases were implemented
* teststeps: improved filtering by regex for any step, which returns string
  or list of stings; filter will process all lines
* teststeps: support for log object
* teststeps: support for trafficgen get_results call
* teststeps: configurable suppression of step validation
* trafficgen: remove old results before traffic is executed
* trafficgen: support for flow control on/off (IxNet)
* trafficgen: support for configurable learning frames (IxNet)
* trafficgen: support for runtime changes of TRAFFICGEN_PKT_SIZES, _DURATION
  and _LOSSRATE
* vnf: flush pexpect output of previous commands
* vnf: use execute_and_wait() to ensure correct cmds order
* vnf: dpdk vHost User interface name set according to its type,
  e.g. dpdkvhostuserclient
* vswitch: support for OVS restart
* decap: simplify configuration of tunneling decapsulation tests
* settings: values of all configuration options are restored after TC execution
* modified formatting of test description used by --list
* testcase name and description is logged before its execution
* small bugfixes

JIRA: VSPERF-539

Change-Id: I550ba0d897ece89abd3f33d6d66f545c4d863e7b
Signed-off-by: Martin Klozik <martinx.klozik@intel.com>
Reviewed-by: Al Morton <acmorton@att.com>
Reviewed-by: Christian Trautman <ctrautma@redhat.com>
Reviewed-by: Sridhar Rao <sridhar.rao@spirent.com>
Reviewed-by: Trevor Cooper <trevor.cooper@intel.com>

1 files changed, 6 insertions, 3 deletions

diff --git a/vnfs/qemu/qemu_dpdk_vhost_user.py b/vnfs/qemu/qemu_dpdk_vhost_user.py
index 93147838..b53af6fa 100644
--- a/vnfs/qemu/qemu_dpdk_vhost_user.py
+++ b/vnfs/qemu/qemu_dpdk_vhost_user.py
@@ -68,11 +68,14 @@ class QemuDpdkVhostUser(IVnfQemu):
             else:
                 vhost_folder = S.getValue('TOOLS')['ovs_var_tmp']
 
-            nic_mode = '' if S.getValue('VSWITCH_VHOSTUSER_SERVER_MODE') else ',server'
+            if S.getValue('VSWITCH_VHOSTUSER_SERVER_MODE'):
+                nic_name = 'dpdkvhostuser' + ifi
+            else:
+                nic_name = 'dpdkvhostuserclient' + ifi + ',server'
+
             self._cmd += ['-chardev',
                           'socket,id=char' + ifi +
-                          ',path=' + vhost_folder +
-                          'dpdkvhostuser' + ifi + nic_mode,
+                          ',path=' + vhost_folder + nic_name,
                           '-netdev',
                           'type=vhost-user,id=' + net +
                           ',chardev=char' + ifi + ',vhostforce' + queue_str,