ec2/gce profiles/providers are no longer configured if they are not used.

Needed because salt-cloud will attempt to load them even if they are
filled with invalid default values, creating error spam.

salt/files/cloud.profiles.d/ec2.conf

 # This file managed by Salt, do not edit by hand!!
+{% set cloud = salt['pillar.get']('salt:cloud', {}) -%}
+{% if 'aws_key' in cloud %}
 base_ubuntu_ec2:
   provider: ec2_ubuntu_public
   image: ami-cb4986bc
       SecurityGroupId:
         - sg-6ec11d3b
   tag: {'Environment': 'production', 'Role': 'ubuntu'}
-  sync_after_install: grains
+  sync_after_install: grains
+{% endif %}

salt/files/cloud.profiles.d/gce.conf

 # This file managed by Salt, do not edit by hand!!
+{%- set cloud = salt['pillar.get']('salt:cloud', {}) -%}
+{%- if 'gce_project' in cloud %}
 base_debian_gce:
   image: debian-7-wheezy
   size: g1-small
   delete_boot_pd: True
   deploy: True
   make_master: False
-  provider: gce
+  provider: gce
+{%- endif %}

salt/files/cloud.providers.d/ec2.conf

 # This file managed by Salt, do not edit by hand!!
 {% set cloud = salt['pillar.get']('salt:cloud', {}) -%}
+{% if 'aws_key' in cloud %}
 ec2_ubuntu_public:
   minion:
     master: {{ cloud.get('master', 'salt') }}
   availability_zone: eu-west-1a
   ssh_username: ubuntu
   provider: ec2
+{% endif %}

salt/files/cloud.providers.d/gce.conf

 # This file managed by Salt, do not edit by hand!!
-{% set cloud = salt['pillar.get']('salt:cloud', {}) -%}
+{%- set cloud = salt['pillar.get']('salt:cloud', {}) -%}
+{%- if 'gce_project' in cloud %}
 gce:
   project: "{{ cloud.get('gce_project', 'DEFAULT') }}"
   service_account_email_address: "{{ cloud.get('gce_service_account_email_address', 'DEFAULT') }}"
   grains:
     test: True
   provider: gce
+{%- endif %}