Do not create unused TestJobUser
Do not create unused TestJobUser

Everytime a user does look at the definition, a TestJobUser object was created.

Change-Id: I5618ef417989a0ad4bb436ec314d7b8dbb4988be

Linaro/lava-server,Linaro/lava-server,Linaro/lava-server,Linaro/lava-server