Hide unactive on explore users and some refactors (#2741)

* hide unactive on explore users and some refactors

* fix test for removed Organizations

* fix test for removed Organizations

* fix imports

* fix logic bug

* refactor the toConds

* Rename TestOrganizations to TestSearchUsers and add tests for users

* fix other tests

* fix other tests

* fix watchers tests

* fix comments and remove unused code

models/fixtures/user.yml

@@ -13,6 +13,7 @@
   avatar: avatar1
   avatar_email: user1@example.com
   num_repos: 0
+  is_active: true
 
 -
   id: 2
@@ -62,6 +63,7 @@
   avatar_email: user4@example.com
   num_repos: 0
   num_following: 1
+  is_active: true
 
 -
   id: 5