Changed the method of counting validations
Changed the method of counting validations

Changed countCompletedValidationMissionsByUserID in MisstionTable.scala
to count all of the validated labels instead of counting all of the
validated missions.

ProjectSidewalk/SidewalkWebpage,ProjectSidewalk/SidewalkWebpage,ProjectSidewalk/SidewalkWebpage,ProjectSidewalk/SidewalkWebpage,ProjectSidewalk/SidewalkWebpage,ProjectSidewalk/SidewalkWebpage