Need to add exec ping wait into task virtual_ips

[Tatyanka]

For now we do not wait in task virtual_ips while vips become ping-able, so may lead to the errors in deployment.
We need to add into virtual_ips.pp exec to ping_wait, to be sure that task really finish with success

𝐒𝐭𝐞𝐩𝐬 𝐭𝐨 𝐫𝐞𝐩𝐫𝐨𝐝𝐮𝐜𝐞
𝟏 . Run single task virtual_ips on controller - task finish without error
𝟐. run test_post for task virtual_ips after task fiinish. It failed with:
http://paste.openstack.org/show/181305/

𝒑𝒊𝒏𝒈 𝒗𝒊𝒑𝒔 𝒎𝒂𝒏𝒖𝒂𝒍𝒍𝒚
[root@node-2 ~]# ping 10.110.1.20
PING 10.110.1.20 (10.110.1.20) 56(84) bytes of data.
From 10.110.1.3 icmp_seq=2 Destination Host Unreachable
From 10.110.1.3 icmp_seq=3 Destination Host Unreachable
From 10.110.1.3 icmp_seq=4 Destination Host Unreachable
From 10.110.1.3 icmp_seq=5 Destination Host Unreachable
From 10.110.1.3 icmp_seq=6 Destination Host Unreachable
From 10.110.1.3 icmp_seq=7 Destination Host Unreachable

𝒘𝒂𝒊𝒕 𝒏𝒆𝒂𝒓 20-30 𝒔𝒆𝒄𝒐𝒏𝒅𝒔 𝒂𝒏𝒅 𝒑𝒊𝒏𝒈 𝒎𝒂𝒏𝒖𝒂𝒍𝒍𝒚 𝒂𝒈𝒂𝒊𝒏 -
passed
𝒓𝒖𝒏 𝒑𝒐𝒔𝒕 𝒕𝒆𝒔𝒕 𝒐𝒏𝒆 𝒎𝒐𝒓𝒆 𝒕𝒊𝒎𝒆 - 𝒊𝒕 𝒊𝒔 𝒑𝒂𝒔𝒔𝒆𝒅

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/159066

[OpenStack Infra (hudson-openstack)]

Change abandoned by Igor Shishkin (<email address hidden>) on branch: master
Review: https://review.openstack.org/159066
Reason: This review is > 4 weeks without comment, and failed Jenkins the last time it was checked. We are abandoning this for now. Feel free to reactivate the review by pressing the restore button and leaving a 'recheck' comment to get fresh test results.