fixing incorrect missing ansible error
fixing incorrect missing ansible error

At least for ansible 2.0.0.1 the command `ansible-galaxy --help` is inappropriate for testing if ansible is installed, as it yields an error:

```
vagrant@vagrant-ubuntu-trusty-64:~$ ansible-galaxy --help && echo "OK"          
Usage: ansible-galaxy [delete|import|info|init|install|list|login|remove|search|setup] [--help] [options] ...

Options:
  -h, --help     show this help message and exit
  -v, --verbose  verbose mode (-vvv for more, -vvvv to enable connection
                 debugging)
  --version      show program's version number and exit
ERROR! Missing required action
```
aneeshusa/vagrant,benh57/vagrant,benizi/vagrant,Endika/vagrant,tomfanning/vagrant,sni/vagrant,carlosefr/vagrant,mkuzmin/vagrant,benizi/vagrant,benh57/vagrant,justincampbell/vagrant,kamazee/vagrant,vamegh/vagrant,mkuzmin/vagrant,signed8bit/vagrant,marxarelli/vagrant,mwrock/vagrant,justincampbell/vagrant,petems/vagrant,mitchellh/vagrant,kamazee/vagrant,crashlytics/vagrant,Endika/vagrant,marxarelli/vagrant,krig/vagrant,PatrickLang/vagrant,signed8bit/vagrant,lonniev/vagrant,TheBigBear/vagrant,kamigerami/vagrant,gitebra/vagrant,PatOShea/vagrant,lukebakken/vagrant,benizi/vagrant,kamigerami/vagrant,justincampbell/vagrant,jtopper/vagrant,Chhed13/vagrant,mitchellh/vagrant,bdwyertech/vagrant,bshurts/vagrant,kamazee/vagrant,johntron/vagrant,bdwyertech/vagrant,signed8bit/vagrant,gitebra/vagrant,lukebakken/vagrant,lukebakken/vagrant,aneeshusa/vagrant,mitchellh/vagrant,chrisroberts/vagrant,crashlytics/vagrant,krig/vagrant,Endika/vagrant,carlosefr/vagrant,PatOShea/vagrant,Endika/vagrant,sax/vagrant,marxarelli/vagrant,sni/vagrant,petems/vagrant,marxarelli/vagrant,krig/vagrant,petems/vagrant,lonniev/vagrant,taliesins/vagrant,aneeshusa/vagrant,sni/vagrant,bshurts/vagrant,mitchellh/vagrant,bryson/vagrant,PatOShea/vagrant,benizi/vagrant,bshurts/vagrant,bryson/vagrant,vamegh/vagrant,crashlytics/vagrant,jtopper/vagrant,bdwyertech/vagrant,bdwyertech/vagrant,kamigerami/vagrant,Chhed13/vagrant,krig/vagrant,lukebakken/vagrant,mkuzmin/vagrant,kamigerami/vagrant,TheBigBear/vagrant,taliesins/vagrant,mwrock/vagrant,sax/vagrant,mkuzmin/vagrant,mwrock/vagrant,sax/vagrant,kamazee/vagrant,johntron/vagrant,benh57/vagrant,TheBigBear/vagrant,vamegh/vagrant,tomfanning/vagrant,PatOShea/vagrant,tomfanning/vagrant,TheBigBear/vagrant,bshurts/vagrant,taliesins/vagrant,jtopper/vagrant,johntron/vagrant,benh57/vagrant,tomfanning/vagrant,petems/vagrant,carlosefr/vagrant,gitebra/vagrant,aneeshusa/vagrant,Chhed13/vagrant,crashlytics/vagrant,vamegh/vagrant,lonniev/vagrant,gitebra/vagrant,sax/vagrant,Chhed13/vagrant,PatrickLang/vagrant,chrisroberts/vagrant,carlosefr/vagrant,PatrickLang/vagrant,mwrock/vagrant,justincampbell/vagrant,johntron/vagrant,PatrickLang/vagrant,taliesins/vagrant,jtopper/vagrant,lonniev/vagrant,chrisroberts/vagrant,chrisroberts/vagrant,bryson/vagrant,sni/vagrant,bryson/vagrant,signed8bit/vagrant