Add initial pillar for single node deployment

Change-Id: I70f258509b38b2a616be34913c7345d93c2b50ad

metadata/service/master/single.yml

+applications:
+- galera
+classes:
+- service.galera.support
+parameters:
+  _param:
+    galera_server_cluster_name: galeracluster
+    galera_server_bind_address: ${_param:single_address}
+    galera_server_bind_port: 3306
+    galera_server_admin_user: root
+    galera_max_connections: 20000
+    galera_innodb_buffer_pool_size: 3138M
+    galera_innodb_read_io_threads: 8
+    galera_innodb_write_io_threads: 8
+    galera_wsrep_slave_threads: 8
+    galera_xtrabackup_parallel: 4
+    galera_error_log_enabled: false
+  galera:
+    master:
+      enabled: true
+      name: ${_param:galera_server_cluster_name}
+      bind:
+        address: ${_param:galera_server_bind_address}
+        port: ${_param:galera_server_bind_port}
+      maintenance_password: ${_param:galera_server_maintenance_password}
+      admin:
+        user: ${_param:galera_server_admin_user}
+        password: ${_param:galera_server_admin_password}
+      members:
+      - host: ${_param:single_address}
+        port: 4567
+      max_connections: ${_param:galera_max_connections}
+      innodb_buffer_pool_size: ${_param:galera_innodb_buffer_pool_size}
+      innodb_read_io_threads: ${_param:galera_innodb_read_io_threads}
+      innodb_write_io_threads: ${_param:galera_innodb_write_io_threads}
+      wsrep_slave_threads: ${_param:galera_wsrep_slave_threads}
+      xtrabackup_parallel: ${_param:galera_xtrabackup_parallel}
+      error_log_enabled: ${_param:galera_error_log_enabled}
+  mysql:
+    server:
+      users:
+      - name: haproxy
+        host: localhost
+      - name: haproxy
+        host: '%'
+      - name: haproxy
+        host: ${_param:single_address}

tests/pillar/single.sls

+galera:
+  master:
+    enabled: true
+    name: galeracluster
+    bind:
+      address: 127.0.0.1
+      port: 3306
+    maintenance_password: password
+    admin:
+      user: root
+      password: password
+    members:
+    - host: 127.0.0.1
+      port: 4567
+  clustercheck:
+    enabled: False
+mysql:
+  server:
+    enabled: true
+    bind:
+      address: 0.0.0.0
+      port: 3306
+      protocol: tcp
+    database:
+      mydb:
+        encoding: 'utf8'
+    users:
+    - name: haproxy
+      host: localhost
+    - name: haproxy
+      host: '%'
+    - name: haproxy
+      host: 127.0.0.1
+    - name: clustercheck
+      #host: localhost
+      password: password
+      database: '*.*'
+      grants: PROCESS
+    - name: inspector
+      host: 127.0.0.1
+      password: password
+      databases:
+        - database: mydb
+          table: mytable
+          grant_option: True
+          grants:
+          - all privileges