Test case add new exercise.

src/main/kotlin/com/aitrainer/api/model/Exercises.kt

@@ -1,7 +1,6 @@
 package com.aitrainer.api.model
 
 import org.springframework.lang.NonNull
-import java.sql.Date
 import javax.persistence.Entity
 import javax.persistence.GeneratedValue
 import javax.persistence.GenerationType
@@ -12,7 +11,7 @@ import javax.validation.constraints.Null
 data class Exercises (
         @get: NonNull var exerciseTypeId: Long = 0,
         @get: NonNull var customerId: Long = 0,
-        @get: NonNull var datetimeExercise: Date? = null,
+        @get: NonNull var datetimeExercise: String? = null,
         @get: NonNull var quantity: Int = 0,
         @get: Null var restTime: Int?, // in seconds