Display zuul version from zuul/status

* it could be useful to determine when zuul updated
* it requires Id451f15538258ab2dec8e3e8f000cff4a8b7b20d to display version

Change-Id: Ic8664927b3b5d713f9ae84bffe0a7c3455eee4fa
Display last reconfigured time from zuul/status

* it could be useful to determine when zuul conf reloaded
* it requires I03c5a5734f2127ef40be9ec512c983b136508be7 to display time

Change-Id: I29709b9ee91d0096a3263e1ffbc8efd4374f2453
Merge "Display zuul version from zuul/status"
Merge "Display last reconfigured time from zuul/status"