Description of problem:
This may be only a spec test problem, reporting just so that I don't forget. 

After change [2] I am seeing random spec test failures of owner_product_resource_spec:"updates individual product fields". If the sleep in [1] on line 48 is uncommented, it will fail every time.

When product is updated using OwnerProductResource.updateProduct (@PUT), the ProductAttribute.updated is changed. This is probably because of the @Cascade({ CascadeType.ALL }) and   @PreUpdate   protected void onUpdate(). 

[1] https://github.com/candlepin/candlepin/blob/2ffbc5111254a642863e0235494573fac182a454/server/spec/owner_product_resource_spec.rb#L48

[2] https://github.com/candlepin/candlepin/commit/5e130cdc130403b8ff72590ddf8383ebc9e806dc

Version-Release number of selected component (if applicable):


How reproducible:
always

Steps to Reproduce:
1. Uncomment line [1] and run spec test

Actual results:
  1) Owner Product Resource updates individual product fields
     Failure/Error: prod.attributes.should == temp_attributes
     
       expected: [{"created"=>"2016-10-20T05:52:05+0000", "updated"=>"2016-10-20T05:52:07+0000", "name"=>"type", "value"=>"SVC"}]
            got: [{"created"=>"2016-10-20T05:52:05+0000", "updated"=>"2016-10-20T05:52:09+0000", "name"=>"type", "value"=>"SVC"}] (using ==)
       Diff:
       @@ -1,5 +1,5 @@
        [{"created"=>"2016-10-20T05:52:05+0000",
       -  "updated"=>"2016-10-20T05:52:07+0000",
       +  "updated"=>"2016-10-20T05:52:09+0000",
          "name"=>"type",
          "value"=>"SVC"}]


Expected results:
Spec test pass

Additional info: