Fixing various problems with the syncing of endpoints, throttling sta… (#398)

* Fixing various problems with the syncing of endpoints, throttling stale endpoints etc.

lemur/endpoints/models.py

@@ -62,6 +62,9 @@ class Endpoint(db.Model):
     policy_id = Column(Integer, ForeignKey('policy.id'))
     policy = relationship('Policy', backref='endpoint')
     certificate_id = Column(Integer, ForeignKey('certificates.id'))
+    source_id = Column(Integer, ForeignKey('sources.id'))
+    sensitive = Column(Boolean, default=False)
+    source = relationship('Source', back_populates='endpoints')
 
     @property
     def issues(self):

lemur/endpoints/service.py

@@ -48,6 +48,15 @@ def get_by_dnsname(endpoint_dnsname):
     return database.get(Endpoint, endpoint_dnsname, field='dnsname')
 
 
+def get_by_source(source_label):
+    """
+    Retrieves all endpoints for a given source.
+    :param source_label:
+    :return:
+    """
+    return Endpoint.query.filter(Endpoint.source.label == source_label).all()  # noqa
+
+
 def create(**kwargs):
     """
     Creates a new endpoint.