Stacktira scenario wip

Change-Id: I2cee405be978e91076e6325c619c7dbe6695ca1f
Fix networking issues

Change-Id: Ibad06ae652661edbda29bc646f251279f22b2a06
Add sysctl module to aptira puppetfile

Change-Id: Ib27c276a5c762b7f49c4df08d773b69fffc324c8
Remove duplicate external interface definition

Change-Id: I63f126a307371d47eb797cb427aeb21ef16c39f1
bump build-server memory to 3k

Change-Id: I215f0ec6b0452bda9b7b1d8c8376da5bf7d5de8e
Ensure hiera version supoprt interpolation

Change-Id: I0938fb9abccba436112f953d44ca58b17d67885b
Remove rebase artifact

Change-Id: I829c0c42cebfe13fc4e4f1bcc3c1c8fbd84444ad