Fix unit test case of getEmbeddedInstance method

[ankit-agrawal11]

Originally reported by: Shivam Pandey (Bitbucket: shivamcausecode, GitHub: shivamcausecode)

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When we call getEmbeddedInstance on the object of the domain class, we must verify all fields. In the current test cases that I have written here,
https://bitbucket.org/causecode/nucleus/pull-requests/40/add-embedded-user-class/diff#Lsrc/test/groovy/com/causecode/user/UserSpec.groovyT96
I am checking for some of the fields only in then block.If one or more fields which are not added in then block get deleted or not initialized properly in the domain class, this will have no effect in the unit test but the unit test should be failed.
This issue is created to add all such left embedded fields while checking in then block.

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• Bitbucket: https://bitbucket.org/causecode/nucleus/issue/34