[core] add some missing DBs to the YCSB help script.

bin/ycsb

@@ -56,6 +56,8 @@ DATABASES = {
     "arangodb"     : "com.yahoo.ycsb.db.ArangoDBClient",
     "arangodb3"    : "com.yahoo.ycsb.db.arangodb.ArangoDB3Client",
     "asynchbase"   : "com.yahoo.ycsb.db.AsyncHBaseClient",
+    "azuredocumentdb"   : "com.yahoo.ycsb.db.azuredocumentdb.AzureDocumentDBClient",
+    "azuretablestorage" : "com.yahoo.ycsb.db.azuretablestorage.AzureClient",
     "basic"        : "com.yahoo.ycsb.BasicDB",
     "basicts"      : "com.yahoo.ycsb.BasicTSDB",
     "cassandra-cql": "com.yahoo.ycsb.db.CassandraCQLClient",
@@ -63,9 +65,9 @@ DATABASES = {
     "cloudspanner" : "com.yahoo.ycsb.db.cloudspanner.CloudSpannerClient",
     "couchbase"    : "com.yahoo.ycsb.db.CouchbaseClient",
     "couchbase2"   : "com.yahoo.ycsb.db.couchbase2.Couchbase2Client",
-    "azuredocumentdb" : "com.yahoo.ycsb.db.azuredocumentdb.AzureDocumentDBClient",
     "dynamodb"     : "com.yahoo.ycsb.db.DynamoDBClient",
     "elasticsearch": "com.yahoo.ycsb.db.ElasticsearchClient",
+    "elasticsearch5": "com.yahoo.ycsb.db.elasticsearch5.ElasticsearchClient",
     "geode"        : "com.yahoo.ycsb.db.GeodeClient",
     "googlebigtable"  : "com.yahoo.ycsb.db.GoogleBigtableClient",
     "googledatastore" : "com.yahoo.ycsb.db.GoogleDatastoreClient",