Add maven stage yaml for CPS-Core

- Add new maven stage file to update version from 3.1.0 to 3.1.1

Issue-ID: CPS-1296
Change-Id: I9936493cef19c17f5014990ec0e73d9ad46b5603
Signed-off-by: mpriyank <priyank.maheshwari@est.tech>
1 file changed