Only trigger on new stemcells for stemcell pipeline BATs
Only trigger on new stemcells for stemcell pipeline BATs

* Now with more whitespace fixes

[#131223047]

Signed-off-by: Danny Berger <8efccf38e9d8f361e1973ad644e1b1e50ad8ecfe@pivotal.io>

barthy1/bosh,barthy1/bosh,barthy1/bosh,barthy1/bosh