fix bug where student_id wasn't being allocated with submission in Submissions#create spec example for submissions controller
fix bug where student_id wasn't being allocated with submission in Submissions#create spec example for submissions controller

UM-USElab/gradecraft-development,mkoon/gradecraft-development,UM-USElab/gradecraft-development,mkoon/gradecraft-development,UM-USElab/gradecraft-development,UM-USElab/gradecraft-development,mkoon/gradecraft-development