Copy specs for extracted behavior

[#63074062]

Signed-off-by: Abhijit Hiremagalur <abhi@pivotallabs.com>
Make router package and files match

[#63074062]

Signed-off-by: Abhijit Hiremagalur <abhi@pivotallabs.com>
Extract registryMessage into own file

[#63074062]

Signed-off-by: Abhijit Hiremagalur <abhi@pivotallabs.com>