Moving the STEM activity code to start from 1000, as this should stop it colliding with tests where specific codes are used to match to smart connector values, this should hopefully stop flaky test issues

Author: msquance-stem

spec/factories/activities.rb

@@ -7,7 +7,7 @@
     sequence(:stem_course_template_no) { SecureRandom.uuid }
     category { "face-to-face" }
     provider { "stem-learning" }
-    sequence(:stem_activity_code) { |n| "CP#{n}" }
+    sequence(:stem_activity_code, 1000) { |n| "CP#{n}" }
     always_on { false }
     retired { false }
     self_verification_info { nil }