Remove name unique key from table builders

Remove "unique key' for column name in table builders.

inau.py

@@ -95,7 +95,7 @@ class Hosts(db.Model):
 class Builders(db.Model):
     id = db.Column(db.Integer, primary_key=True)
     platform_id = db.Column(db.Integer, db.ForeignKey('platforms.id'), nullable=False)
-    name = db.Column(db.String(255), unique=True, nullable=False)
+    name = db.Column(db.String(255), unique=False, nullable=False)
     platform = db.relationship('Platforms', lazy=True, backref=db.backref('builders', lazy=True))
 
 class Artifacts(db.Model):