[5.0-16 automation] Fix for intf_mirror test case

[Ankit Jain]

TestIntfMirror.test_intf_mirror_src_cn1vn1_dst_cn2vn2_analyzer_cn3vn3[cb_sanity,ci_sanity_WIP,quick_sanity,sanity]

The test case was broken by https://review.opencontrail.org/#/c/41865/
Fixing the same through this commit.

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/42038
Submitter: Ankit Jain (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/42038
Committed: http://github.com/Juniper/contrail-test/commit/2c2837f4ef4668a99ce1843472f7be78f3bac5b3
Submitter: Zuul v3 CI (<email address hidden>)
Branch: R5.0

commit 2c2837f4ef4668a99ce1843472f7be78f3bac5b3
Author: ankitja <email address hidden>
Date: Wed Apr 18 01:08:49 2018 +0530

Intf mirror : Fix for intf mirror base test case

Closes-Bug: #1764854

This test case was broken by the commit 41865

Change-Id: Ic7dfde92a681c25694631a5dae8d67e8837bd273

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/42263
Submitter: Ankit Jain (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/42263
Committed: http://github.com/Juniper/contrail-test/commit/f0c57d0a8e56b2de57cccd6507688d49d966bfc3
Submitter: Zuul v3 CI (<email address hidden>)
Branch: R5.0

commit f0c57d0a8e56b2de57cccd6507688d49d966bfc3
Author: ankitja <email address hidden>
Date: Fri Apr 20 15:39:51 2018 +0530

Intf mirror: Fix for intf mirror test cases

1) Removed the retry wrapper from verify_port_mirroring
2) Sleep needs to increased to stop rare inconsitent failures
3) Adding back 2 arguments in enable_intf_mirroring: MirrorActionType

Change-Id: I20197940f73dc7918770783183aa111cdfe594ac
Closes-Bug: #1764854