added missing enum value SINGLE_BATCH_PER_NODE of FlowFileConcurrencyType
<xs:simpleType name="FlowFileConcurrencyType">
<xs:restriction base="xs:string">
<xs:enumeration value="SINGLE_FLOWFILE_PER_NODE" />
+ <xs:enumeration value="SINGLE_BATCH_PER_NODE" />
<xs:enumeration value="UNBOUNDED" />
</xs:restriction>
</xs:simpleType>
