Add DB2 support

add create DB2 database/user and get DB2 sql_connection logic

Change-Id: I17bc8add8c2558429b1675458e53e2e16b1950ac
Implements: blueprint db2-support

libraries/database.rb

@@ -59,6 +59,20 @@ def db_create_with_user service, user, pass
         else
           super_password = node['mysql']['server_root_password']
         end
+      when "db2"
+        db2_database "create database" do
+          db_name db_name
+          action :create
+        end
+
+        db2_user "create database user" do
+          db_user user
+          db_pass pass
+          db_name db_name
+          action :create
+        end
+
+        return info
       else
         ::Chef::Log.error("Unsupported database type #{type}")
       end

libraries/endpoints.rb

@@ -76,6 +76,8 @@ def db_uri service, user, pass
         #  example: info['path'] = '/path/to/foo.db' -- will return sqlite:////foo.db
         path = info['path']
         result = "sqlite:///#{path}"
+      when "db2"
+        result = "ibm_db_sa://#{user}:#{pass}@#{host}:#{port}/#{name}"
       end
     end
   end