change structure of provider companies to organizations

apps/pos_device/models.py

@@ -41,8 +41,8 @@ class Device(BaseModel):
     latitude = models.FloatField(default=0)
     longitude = models.FloatField(default=0)
     is_activated = models.BooleanField(default=False)
-    company = models.ForeignKey(
-        ProviderCompany,
+    organization = models.ForeignKey(
+        Organization,
         on_delete=models.CASCADE,
         related_name='devices',
         null=True
@@ -73,10 +73,10 @@ class DeviceActivationCode(BaseModel):
         related_name="code",
         null=True
     )
-    company = models.ForeignKey(
-        ProviderCompany,
+    organization = models.ForeignKey(
+        Organization,
         on_delete=models.CASCADE,
-        related_name='code',
+        related_name='device_activations',
         null=True
     )
     code = models.CharField(max_length=10, null=True, unique=True)
@@ -97,10 +97,10 @@ class DeviceVersion(BaseModel):
         related_name='devices_version',
         null=True
     )
-    company = models.ForeignKey(
-        ProviderCompany,
+    organization = models.ForeignKey(
+        Organization,
         on_delete=models.CASCADE,
-        related_name='devices_company',
+        related_name='device_versions',
         null=True
     )
     name = models.CharField(max_length=250, null=True)
@@ -210,10 +210,10 @@ class POSClientAttributeValue(BaseModel):
 
 
 class DeviceAssignment(BaseModel):
-    company = models.ForeignKey(
-        ProviderCompany,
+    organization = models.ForeignKey(
+        Organization,
         on_delete=models.CASCADE,
-        related_name='assignments',
+        related_name='device_assignments',
         null=True
     )
     client = models.ForeignKey(