patching attribute with oldValue as undefined

[abrararshad]

Below line in the attribute decorate makes it impossible to patch an attribute that may have come as undefined from the server. New value was never taken into consideration

const propertyHasDirtyAttributes = typeof oldValue === 'undefined' && !isNew ? false : hasDirtyAttributes;

[coveralls]

Coverage remained the same at 88.194% when pulling bb1bfdf on abrararshad:patching_undefined_attribute into 68fb942 on ghidoz:master.

[coveralls]

Coverage remained the same at 88.194% when pulling bb1bfdf on abrararshad:patching_undefined_attribute into 68fb942 on ghidoz:master.