Ensure we use a big-enough ID for resources that aren't supposed to exist

Signed-off-by: Rémy Coutable <remy@rymai.me>

spec/requests/api/v3/issues_spec.rb

@@ -1207,7 +1207,7 @@ describe API::V3::Issues do
 
     context 'when issue does not exist' do
       it 'returns 404 when trying to move an issue' do
-        delete v3_api("/projects/#{project.id}/issues/123", user)
+        delete v3_api("/projects/#{project.id}/issues/999999", user)
 
         expect(response).to have_gitlab_http_status(404)
       end
@@ -1256,7 +1256,7 @@ describe API::V3::Issues do
 
     context 'when issue does not exist' do
       it 'returns 404 when trying to move an issue' do
-        post v3_api("/projects/#{project.id}/issues/123/move", user),
+        post v3_api("/projects/#{project.id}/issues/999999/move", user),
                  to_project_id: target_project.id
 
         expect(response).to have_gitlab_http_status(404)
@@ -1266,7 +1266,7 @@ describe API::V3::Issues do
 
     context 'when source project does not exist' do
       it 'returns 404 when trying to move an issue' do
-        post v3_api("/projects/123/issues/#{issue.id}/move", user),
+        post v3_api("/projects/999999/issues/#{issue.id}/move", user),
                  to_project_id: target_project.id
 
         expect(response).to have_gitlab_http_status(404)
@@ -1277,7 +1277,7 @@ describe API::V3::Issues do
     context 'when target project does not exist' do
       it 'returns 404 when trying to move an issue' do
         post v3_api("/projects/#{project.id}/issues/#{issue.id}/move", user),
-                 to_project_id: 123
+                 to_project_id: 999999
 
         expect(response).to have_gitlab_http_status(404)
       end
@@ -1299,7 +1299,7 @@ describe API::V3::Issues do
     end
 
     it 'returns 404 if the issue is not found' do
-      post v3_api("/projects/#{project.id}/issues/123/subscription", user)
+      post v3_api("/projects/#{project.id}/issues/999999/subscription", user)
 
       expect(response).to have_gitlab_http_status(404)
     end
@@ -1326,7 +1326,7 @@ describe API::V3::Issues do
     end
 
     it 'returns 404 if the issue is not found' do
-      delete v3_api("/projects/#{project.id}/issues/123/subscription", user)
+      delete v3_api("/projects/#{project.id}/issues/999999/subscription", user)
 
       expect(response).to have_gitlab_http_status(404)
     end