ISPN-4029 Reworked NotifyingFutureTest
ISPN-4897 Make all server CLI commands lowercase
ISPN-4888 Use RSA keys instead of DSA to work around key-lenght issue with JDK 8
ISPN-4892 Outdated docs referring to 5.1 schema elements
ISPN-3718 Select which protobuf fields to index

Use protobuf schema doc comment annotations similar with the Hibernate Search annotations @Indexed and @Field.