TrigHLTJetHypo: Fix placement of using directive.

Do not put using directives in headers in the global namespace.

This merge request affects 1 package:

• Trigger/TrigHypothesis/TrigHLTJetHypo

added JetEtmiss Trigger master review-pending-level-1 labels

CI Result SUCCESS

	Athena	AthSimulation
externals
cmake
make
required tests
optional tests

Full details available at NICOS MR-22522-2019-04-09-14-17
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST 36754]

Hi,

trivial changes, approving.

Cheers, Tomas (L1)

added review-approved label and removed review-pending-level-1 label

merged

mentioned in commit 717a4506

added sweep:ignore label