Tests: Add fix for multibidspec flaky tests

[marki1an]

This PR aim to resolve this one flaky test

Error:  Tests run: 10, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 1.455 s <<< FAILURE! - in MultibidSpec
Error:  PBS should prefer bidRequest over account level config [requestTargeting: org.prebid.server.functional.model.request.auction.Targeting{includeWinners:true, includeBidderKeys:false, preferDeals:true, alwaysIncludeDeals:false, includeFormat:false}, accountTargeting: org.prebid.server.functional.model.request.auction.Targeting{includeWinners:true, includeBidderKeys:false, preferDeals:true, alwaysIncludeDeals:false, includeFormat:false}, #2]  Time elapsed: 0.67 s  <<< FAILURE!
org.spockframework.runtime.ConditionNotSatisfiedError: 
Condition not satisfied:

bidderRequest.ext.prebid.targeting != accountTargeting
|             |   |      |         |  |
|             |   |      |         |  org.prebid.server.functional.model.request.auction.Targeting(includeWinners:true, includeBidderKeys:false, preferDeals:true, alwaysIncludeDeals:false, includeFormat:false)
|             |   |      |         false

[Net-burst]

LGTM