[R4.1-106]- Automation: fix scp test cases, copy ssh-keys to VM

[alok kumar]

sanity tests which uses scp between VMs are failing due to ssh keys not getting copied on VMs.

fix it as below:

1. currently fab method fab_put_file_to_vm is used to copy key to VM which infact fails.
      Enhance the method copy_file_to_vm which can copy from remote to VM now and use this to copy keys from config to VM.
2. if ssh key is not available on config node, generate it.
3. copy only private key on source VM
4. copy only public key on destination VM.

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/41006
Submitter: alok kumar (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/41007
Submitter: alok kumar (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/41006
Submitter: alok kumar (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/41006
Committed: http://github.com/Juniper/contrail-test-ci/commit/d849d476af4ad59b75417cb1aab78c3efcc3427d
Submitter: Zuul (<email address hidden>)
Branch: R4.1

commit d849d476af4ad59b75417cb1aab78c3efcc3427d
Author: Alok Kumar <email address hidden>
Date: Fri Mar 23 16:16:30 2018 +0530

Fix for scp cases in sanity

1. currently fab method fab_put_file_to_vm is used
 to copy key to VM which infact fails. Enhance the
 method copy_file_to_vm which can copy from remote
 to VM now and use this to copy keys from config to VM.
2. if ssh key is not available on config node, generate it.
3. copy only private key on source VM
4. copy only public key on destination VM

Closes-bug: #1758304

Change-Id: I0a82f72a7ad34abf70fcbb7ae06c9128e176b1e9

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/41007
Committed: http://github.com/Juniper/contrail-test/commit/b9dbd368583d7b26e807eb74efa904a9997be625
Submitter: Zuul (<email address hidden>)
Branch: R4.1

commit b9dbd368583d7b26e807eb74efa904a9997be625
Author: Alok Kumar <email address hidden>
Date: Fri Mar 23 16:21:35 2018 +0530

Fix for scp cases in sanity

1. copy only private key on source VM
2. copy only public key on destination VM

Closes-bug: #1758304

Change-Id: Ida91641198b656408e20ae19e55dcf3df1836adf

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/41279
Submitter: alok kumar (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/41280
Submitter: alok kumar (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/41279
Committed: http://github.com/Juniper/contrail-test/commit/a1e4a7f1dc9fb8a6b7fe58eaeb57cea112b73a98
Submitter: Zuul (<email address hidden>)
Branch: R4.1

commit a1e4a7f1dc9fb8a6b7fe58eaeb57cea112b73a98
Author: Alok Kumar <email address hidden>
Date: Mon Apr 2 13:02:53 2018 +0530

Revert back copying ssh keys in ci sanity case

Closes-bug: #1758304

Change-Id: I446f50dd2eea34c9b978ae92c0501c3f8e3753b3

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/41280
Committed: http://github.com/Juniper/contrail-test-ci/commit/0acd690608fe8a5f7f91f03f1bfe75438d15f680
Submitter: Zuul (<email address hidden>)
Branch: R4.1

commit 0acd690608fe8a5f7f91f03f1bfe75438d15f680
Author: Alok Kumar <email address hidden>
Date: Mon Apr 2 13:07:33 2018 +0530

Handle the exception when keys are not in /tmp

Closes-bug: #1758304

Change-Id: If7669c075cedd145cf32b9bfcc453c6873c50c65