Disable facts gathering on top-level playbooks

In the playbooks logic, the facts are not used and they are a
quite expensive operation, this speeds up execution.

bootstrap_puppet_infra_nodes.yml

@@ -1,6 +1,7 @@
 ---
 # file: bootstrap_puppet_infra_nodes.yml
 - hosts: infra:!meta-infra_type_puppetmaster
+  gather_facts: no
   user: ubuntu
   sudo: true
   roles:

bootstrap_puppetmaster.yml

@@ -1,6 +1,7 @@
 ---
 # file: bootstrap_puppetmaster.yml
 - hosts: meta-infra_type_puppetmaster
+  gather_facts: no
   user: ubuntu
   sudo: true
   roles:

common.yml

@@ -1,6 +1,7 @@
 ---
 # file: common.yml
 - hosts: infra
+  gather_facts: no
   user: ubuntu
   sudo: true
   roles:

deploy_hiera.yml

@@ -1,6 +1,7 @@
 ---
 # file: deploy_hiera.yml
 - hosts: meta-infra_type_puppetmaster
+  gather_facts: no
   user: ubuntu
   sudo: true
   roles:

deploy_system_config.yml

@@ -1,6 +1,7 @@
 ---
 # file: deploy_system_config.yml
 - hosts: localhost
+  gather_facts: no
   connection: local
   roles:
     - { role: deploy_system_config }

post_puppet_gerrit.yml

@@ -1,6 +1,7 @@
 ---
 # file: post_puppet_gerrit.yml
 - hosts: meta-infra_type_gerrit
+  gather_facts: no
   user: ubuntu
   sudo: true
   roles:

post_puppet_jenkins.yml

@@ -1,6 +1,7 @@
 ---
 # file: post_puppet_jenkins.yml
 - hosts: meta-infra_type_jenkins
+  gather_facts: no
   user: ubuntu
   sudo: true
   roles:

pre_puppet_gerrit.yml

@@ -1,6 +1,7 @@
 ---
 # file: pre_puppet_gerrit.yml
 - hosts: meta-infra_type_gerrit
+  gather_facts: no
   user: ubuntu
   sudo: true
   roles:

run_puppet_infra_nodes.yml

@@ -1,6 +1,7 @@
 ---
 # file: run_puppet_infra_nodes
 - hosts: infra:!meta-infra_type_puppetmaster
+  gather_facts: no
   user: ubuntu
   sudo: true
   roles:

set_hostnames.yml

@@ -1,6 +1,7 @@
 ---
 # file: set_hostnames.yml
 - hosts: infra
+  gather_facts: no
   user: ubuntu
   sudo: true
   roles:

sign_infra_nodes_certs.yml

@@ -1,6 +1,7 @@
 ---
 # file: sign_infra_nodes_certs
 - hosts: meta-infra_type_puppetmaster
+  gather_facts: no
   user: ubuntu
   sudo: true
   roles: