Update engine openstack stack to adapt SOF

This change introduces openstack stack for engine in order to package,
deploy, and test stacks independently from engine core.

Checklist:
- [X]  Move packaging functionality from installer to stack
- [X]  Enable online deployment with scenarios
- [X]  Enable offline deployment with scenarios
- [X]  Move scenarios from respective installer to stack
- [X]  Move scenario and common pre/post Install operations from respective installer to stack

Depends-On: I13a8a066932b74fab8da7c4c19a78c7fded098bd
Signed-off-by: eprasad <prasad.mukhedkar@est.tech>
Change-Id: Ia0bb0b386faf17aad76dc65224aba597e0d82ead
diff --git a/playbooks/roles/package/templates/pip.conf.j2 b/playbooks/roles/package/templates/pip.conf.j2
new file mode 100644
index 0000000..9ab40ef
--- /dev/null
+++ b/playbooks/roles/package/templates/pip.conf.j2
@@ -0,0 +1,4 @@
+[global]
+timeout=10
+find-links={{ engine_workspace }}/offline/pip
+no-index=yes