Add student expert

stages/migrations/0007_add_student_expert.py

@@ -0,0 +1,16 @@
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('stages', '0006_student_supervisor_mentor'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='student',
+            name='expert',
+            field=models.ForeignKey(blank=True, null=True, on_delete=models.deletion.SET_NULL, related_name='rel_expert', to='stages.CorpContact', verbose_name='Expert'),
+        ),
+    ]