Refactor context. See #1711.

src/blenderbim/test/bim/feature/context.feature

@@ -0,0 +1,14 @@
+@context
+Feature: Context
+    Manages geometric representation contexts and subcontexts
+
+Scenario: Add subcontext
+    Given an empty IFC project
+    When I press "bim.add_subcontext(context='Model')"
+    Then nothing happens
+
+Scenario: Remove subcontext
+    Given an empty IFC project
+    When the variable "context_id" is "IfcStore.get_file().by_type('IfcGeometricRepresentationContext')[0].id()"
+    And I press "bim.remove_subcontext(ifc_definition_id={context_id})"
+    Then nothing happens

src/blenderbim/test/bim/feature/owner.feature

@@ -1,3 +1,4 @@
+@owner
 Feature: Owner
     Covers ownership history, people, organisations, roles, and addresses.