path meta/main.yml for fix problem in ansible 1.9.4=< :

$ cat ./requirements.yml
---

- name: elastic.ansible-elasticsearch
  src: https://github.com/elastic/ansible-elasticsearch
  scm: git
  version: master

$ ansible-galaxy install -r ./requirements.yml -p ./roles
- executing: git clone https://github.com/elastic/ansible-elasticsearch elastic.ansible-elasticsearch
- executing: git archive --prefix=elastic.ansible-elasticsearch/ --output=/tmp/tmpQHJSY6.tar master
- extracting elastic.ansible-elasticsearch to ./roles/elastic.ansible-elasticsearch
- elastic.ansible-elasticsearch was installed successfully
Traceback (most recent call last):
  File "/usr/bin/ansible-galaxy", line 959, in <module>
    main()
  File "/usr/bin/ansible-galaxy", line 953, in main
    fn(args, options, parser)
  File "/usr/bin/ansible-galaxy", line 845, in execute_install
    role_dependencies = role_data['dependencies']
KeyError: 'dependencies'

meta/main.yml

@@ -22,3 +22,5 @@ galaxy_info:
     - all
   categories:
     - system
+
+dependencies: []