Fixed data_dir path for both config/service

@legal90 kindly pointed out that the default value for
['consul']['config']['data_dir'] & ['consul']['service']['data_dir']
was changed to append 'data' as the last folder. Consul actually
creates this directory for you when you start the service. And if
you didn't change both, it could cause the Consul agent to fail.

attributes/default.rb

@@ -15,7 +15,7 @@
 default['consul']['config']['bag_item'] = 'consul'
 
 default['consul']['config']['path'] = join_path config_prefix_path, 'consul.json'
-default['consul']['config']['data_dir'] = join_path data_prefix_path, 'data'
+default['consul']['config']['data_dir'] = data_prefix_path
 default['consul']['config']['ca_file'] = join_path config_prefix_path, 'ssl', 'CA', 'ca.crt'
 default['consul']['config']['cert_file'] = join_path config_prefix_path, 'ssl', 'certs', 'consul.crt'
 default['consul']['config']['key_file'] = join_path config_prefix_path, 'ssl', 'private', 'consul.key'

test/spec/libraries/consul_service_linux_spec.rb

@@ -9,6 +9,6 @@
     recipe 'consul::default'
 
     it { expect(chef_run).to create_directory('/etc/consul/conf.d') }
-    it { is_expected.to create_directory('/var/lib/consul/data') }
+    it { is_expected.to create_directory('/var/lib/consul') }
   end
 end

test/spec/libraries/consul_service_windows_spec.rb

@@ -21,7 +21,7 @@
     recipe 'consul::default'
 
     it { expect(chef_run).to create_directory('C:\Program Files\consul\conf.d') }
-    it { is_expected.to create_directory('C:\Program Files\consul\data') }
+    it { is_expected.to create_directory('C:\Program Files\consul') }
     it { expect(chef_run).to install_nssm('consul').with(
       program: 'C:\Program Files\consul\consul.exe',
       args: 'agent -config-file="""C:\Program Files\consul\consul.json""" -config-dir="""C:\Program Files\consul\conf.d"""'