fix(tests): make the tests compile again

pkg/db/fixtures/projects.yml

@@ -4,7 +4,6 @@
   description: Lorem Ipsum
   identifier: test1
   owner_id: 1
-  namespace_id: 1
   position: 3
   updated: 2018-12-02 15:13:12
   created: 2018-12-01 15:13:12
@@ -14,7 +13,6 @@
   description: Lorem Ipsum
   identifier: test2
   owner_id: 3
-  namespace_id: 1
   position: 2
   updated: 2018-12-02 15:13:12
   created: 2018-12-01 15:13:12
@@ -24,7 +22,6 @@
   description: Lorem Ipsum
   identifier: test3
   owner_id: 3
-  namespace_id: 2
   position: 1
   updated: 2018-12-02 15:13:12
   created: 2018-12-01 15:13:12
@@ -34,7 +31,6 @@
   description: Lorem Ipsum
   identifier: test4
   owner_id: 3
-  namespace_id: 3
   position: 4
   updated: 2018-12-02 15:13:12
   created: 2018-12-01 15:13:12
@@ -44,7 +40,6 @@
   description: Lorem Ipsum
   identifier: test5
   owner_id: 5
-  namespace_id: 5
   position: 5
   updated: 2018-12-02 15:13:12
   created: 2018-12-01 15:13:12
@@ -54,7 +49,6 @@
   description: Lorem Ipsum
   identifier: test6
   owner_id: 6
-  namespace_id: 6
   position: 6
   updated: 2018-12-02 15:13:12
   created: 2018-12-01 15:13:12
@@ -64,7 +58,6 @@
   description: Lorem Ipsum
   identifier: test7
   owner_id: 6
-  namespace_id: 6
   position: 7
   updated: 2018-12-02 15:13:12
   created: 2018-12-01 15:13:12
@@ -74,7 +67,6 @@
   description: Lorem Ipsum
   identifier: test8
   owner_id: 6
-  namespace_id: 6
   position: 8
   updated: 2018-12-02 15:13:12
   created: 2018-12-01 15:13:12
@@ -84,7 +76,6 @@
   description: Lorem Ipsum
   identifier: test9
   owner_id: 6
-  namespace_id: 6
   position: 9
   updated: 2018-12-02 15:13:12
   created: 2018-12-01 15:13:12
@@ -94,7 +85,6 @@
   description: Lorem Ipsum
   identifier: test10
   owner_id: 6
-  namespace_id: 6
   position: 10
   updated: 2018-12-02 15:13:12
   created: 2018-12-01 15:13:12
@@ -104,7 +94,6 @@
   description: Lorem Ipsum
   identifier: test11
   owner_id: 6
-  namespace_id: 6
   position: 11
   updated: 2018-12-02 15:13:12
   created: 2018-12-01 15:13:12
@@ -114,7 +103,6 @@
   description: Lorem Ipsum
   identifier: test12
   owner_id: 6
-  namespace_id: 7
   position: 12
   updated: 2018-12-02 15:13:12
   created: 2018-12-01 15:13:12
@@ -124,7 +112,6 @@
   description: Lorem Ipsum
   identifier: test13
   owner_id: 6
-  namespace_id: 8
   position: 13
   updated: 2018-12-02 15:13:12
   created: 2018-12-01 15:13:12
@@ -134,7 +121,6 @@
   description: Lorem Ipsum
   identifier: test14
   owner_id: 6
-  namespace_id: 9
   position: 14
   updated: 2018-12-02 15:13:12
   created: 2018-12-01 15:13:12
@@ -144,7 +130,6 @@
   description: Lorem Ipsum
   identifier: test15
   owner_id: 6
-  namespace_id: 10
   position: 15
   updated: 2018-12-02 15:13:12
   created: 2018-12-01 15:13:12
@@ -154,7 +139,6 @@
   description: Lorem Ipsum
   identifier: test16
   owner_id: 6
-  namespace_id: 11
   position: 16
   updated: 2018-12-02 15:13:12
   created: 2018-12-01 15:13:12
@@ -164,7 +148,6 @@
   description: Lorem Ipsum
   identifier: test17
   owner_id: 6
-  namespace_id: 12
   position: 17
   updated: 2018-12-02 15:13:12
   created: 2018-12-01 15:13:12
@@ -176,7 +159,6 @@
   description: Lorem Ipsum
   identifier: test18
   owner_id: 7
-  namespace_id: 13
   position: 18
   updated: 2018-12-02 15:13:12
   created: 2018-12-01 15:13:12
@@ -186,7 +168,6 @@
   description: Lorem Ipsum
   identifier: test19
   owner_id: 7
-  namespace_id: 14
   position: 19
   updated: 2018-12-02 15:13:12
   created: 2018-12-01 15:13:12
@@ -197,17 +178,15 @@
   description: Lorem Ipsum
   identifier: test20
   owner_id: 13
-  namespace_id: 15
   position: 20
   updated: 2018-12-02 15:13:12
   created: 2018-12-01 15:13:12
 -
   id: 21
-  title: Test21 archived through namespace
+  title: Test21 archived through parent list
   description: Lorem Ipsum
   identifier: test21
   owner_id: 1
-  namespace_id: 16
   position: 21
   updated: 2018-12-02 15:13:12
   created: 2018-12-01 15:13:12
@@ -217,7 +196,6 @@
   description: Lorem Ipsum
   identifier: test22
   owner_id: 1
-  namespace_id: 1
   is_archived: 1
   position: 22
   updated: 2018-12-02 15:13:12
@@ -228,7 +206,6 @@
   description: Lorem Ipsum
   identifier: test23
   owner_id: 12
-  namespace_id: 17
   position: 23
   updated: 2018-12-02 15:13:12
   created: 2018-12-01 15:13:12
@@ -238,7 +215,6 @@
   description: Lorem Ipsum
   identifier: test6
   owner_id: 6
-  namespace_id: 6
   position: 7
   updated: 2018-12-02 15:13:12
   created: 2018-12-01 15:13:12