Travis - fix test failures observed

[Pearl1594]

Description

This PR fixes a subset of travis test failures as indicated in: #6115
They include:
component/test_acl_sharednetwork_deployVM-impersonation:

• test_deployVM_in_sharedNetwork_as_regularuser_scope_all_anotherusersamedomain
• test_deployVM_in_sharedNetwork_as_regularuser_scope_all_crossdomain

component/test_acl_isolatednetwork

• test_19_deployvm_user_foruserinsamedomain
• test_20_deployvm_user_foruserincrossdomain
• test_29_restartNetwork_user_foruserinsamedomain
• test_30_restartNetwork_user_foruserinotherdomain

component/test_acl_isolatednetwork_delete

• test_deleteNetwork_user_foruserinotherdomain
• test_deleteNetwork_user_foruserinsamedomain

Types of changes

• Breaking change (fix or feature that would cause existing functionality to change)
• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Enhancement (improves an existing feature and functionality)
• Cleanup (Code refactoring and cleanup, that may add test cases)

Feature/Enhancement Scale or Bug Severity

Bug Severity

• BLOCKER
• Critical
• Major
• Minor
• Trivial

Screenshots (if appropriate):

How Has This Been Tested?

[weizhouapache]

@Pearl1594
since the travis test fails on 4.16, can you re-target to 4.16 ?

as we discussed internally, it would be better to create all bug fixes for LTS version then merge forward to main branch.

[Pearl1594]

Sure @weizhouapache I'll target this PR against 4.16. Thanks.

[nvazquez]

Merging based on approvals and Travis test results since this PR fixes them

[nvazquez]

@Pearl1594 given #6126, does this PR need to be reverted as well?

[Pearl1594]

These test failures didn't pertain to the changes made in #6126 @nvazquez