Fix all the uses of node.in_shard?(x) where x is a multiple of 5

Differential Revision: D49900503

fbshipit-source-id: 6372c56d38d161a8a819fc3d0a0698b8ee423153

itchef/cookbooks/fb_helpers/spec/node_spec.rb

@@ -149,9 +149,9 @@
       expect(node.in_shard?(67)).to eq(true)
     end
     it 'should return false if we are not in shard' do
-      expect(node.in_shard?(65)).to eq(false)
+      expect(node.in_shard?(64)).to eq(false)
       # Should remain false on second calling
-      expect(node.in_shard?(65)).to eq(false)
+      expect(node.in_shard?(64)).to eq(false)
     end
     it 'should retain legacy overflow behaviour' do
       # avoid using literals so linters don't fire