Add option to specify source and destination host

This patch adds new class of tests, in which it is possible to
specify source and destination host to migration.

Closes-Bug: #2028540
Change-Id: If07355464d1567c18bedbf07c479e61874ec2031
diff --git a/releasenotes/notes/add-option-to-specify-source-host.yaml b/releasenotes/notes/add-option-to-specify-source-host.yaml
new file mode 100644
index 0000000..f8df40a
--- /dev/null
+++ b/releasenotes/notes/add-option-to-specify-source-host.yaml
@@ -0,0 +1,5 @@
+---
+features:
+  - Add a new config options migration_source_host and migration_dest_host
+    in the compute section, which if is set takes source or destination
+    host from options, otherwise a host is chosen automatically.