Added options for enabling instance_passwords

The nova.conf and tempest.conf option for `enable_instance_password` has been
added as a default. This option has a default of True in nova but false in tempest. 
This causes temptest to fail scheme validation on newer versions of temptest. 
To fix this issue the option being added with a default value of True for both
tempest and nova.

Change-Id: I19f5da9820f2367b3d8dd0a7f215aa3f3ea5f611
Partial-Bug: #1468061

playbooks/roles/os_nova/defaults/main.yml

@@ -165,6 +165,7 @@ nova_metadata_program_name: nova-api-metadata
 nova_cert_program_name: nova-cert
 
 ## Nova compute
+nova_enable_instance_password: True
 nova_compute_program_name: nova-compute
 
 ## Nova conductor

playbooks/roles/os_nova/templates/nova.conf.j2

@@ -38,6 +38,7 @@ scheduler_max_attempts = {{ nova_scheduler_max_attempts }}
 scheduler_weight_classes = {{ nova_scheduler_weight_classes }}
 
 # Compute
+enable_instance_password = {{ nova_enable_instance_password }}
 compute_driver = {{ nova_compute_driver }}
 instance_name_template = instance-%08x
 instances_path = {{ nova_system_home_folder }}/instances

playbooks/roles/os_tempest/defaults/main.yml

@@ -100,3 +100,5 @@ tempest_images:
   - url: "http://download.cirros-cloud.net/0.3.3/cirros-0.3.3-x86_64-disk.img"
     sha256: "f11286e2bd317ee1a1d0469a6b182b33bda4af6f35ba224ca49d75752c81e20a"
     name: "cirros-0.3.3-x86_64-disk.img"
+
+tempest_enable_instance_password: True

playbooks/roles/os_tempest/templates/tempest.conf.j2

@@ -83,6 +83,7 @@ snapshot = {{ tempest_compute_resize_enabled }}
 spice_console = true
 suspend = false
 vnc_console = false
+enable_instance_password = {{ tempest_enable_instance_password }}
 
 
 [dashboard]