SES-1803 : Reuse NTriplesUtil in RenderUtils
SES-1803 : Avoid writing native datatypes for RDF/XML
SES-1803 : Remove a datatype != null wrapper that is not used anymore
SES-1803 : Avoid writing datatype if there was a language tag
SES-1803 : Enforce xsd:string and rdf:langString in SPARQL JSON writer
SES-1803 : Fix RDFParserHelperTest to match new Literal contract
SES-1803 : Fix LiteralImpl in the case where both language and datatype
are null
SES-1803 : Add missing check in test to verify Literal.isLanguageLiteral
SES-1803 : Fix NQuadsParserTestCase
SES-1803 : Avoid writing out rdf:langString for RDF/JSON
SES-1803 : Rewrite assertNull(literal.getDatatype()) in HashFunctionTest
SES-1803 : Only fail for language literals in StringCast
SES-1803 : Patch StrBeforeTest
SES-1803 : Replace now expects string literals, as simple literal always
returns false in RDF-1.1
SES-1803 : Patch TzTest
SES-1803 : Patch regex evaluation test
SES-1803 : Patch LiteralComparator test

Patch now verifies that there is no difference between RDF-1.0 simple
and RDF-1.1 string literals
SES-1803 : Patch StrAfter test
SES-1803 : Avoid going into datatype section if we have a language
literal
SES-1803 : Change default for LiteralImpl to not print xsd:string given
it is now inferred