SES-1835 : Synchronise ParserConfig in RepositoryConnectionWrapper

All calls to setDelegate will result in the parser config on the
delegate being reused

All calls to getParserConfig are identical to RepositoryConnectionBase
behaviour, so they will return the wrappers object, which should be
synchronised with the delegates after all calls to setDelegate and
setParserConfig
Merged in SES-1835 (pull request #136)

SES-1835 : Synchronise ParserConfig in RepositoryConnectionWrapper
SES-1835 patch to do check for null reference, occurs in execution of
ContextAwareConnection unit tests.
set version number in prep for release
[maven-release-plugin] prepare release 2.7.1
[maven-release-plugin] prepare for next development iteration
Bump Jackson version to 2.2.1

Relevant changes:

JACKSON-884 : JsonStringEncoder.quoteAdStringValue fails to encode ctrl chars correctly
Issue #51: JsonLocation had non-serializable field, mark as transient
Switch JSONLDSettings.USE_NATIVE_TYPES to false for RDF compatibility

http://lists.w3.org/Archives/Public/public-rdf-wg/2013May/0152.html
SES-1837 Addition of xsd namespace mapping unnecessary for XSLT, and caused
issues for Explore page when the repository doesn't define the prefix.
SES-1839 Don't render "error" span when there is no error message.
Merged in dvisser/sesame/ses-1837 (pull request #138)

SES-1837 Fix for exploring XSD-prefixed literals when prefix is undefined in repository
Merged in dvisser/sesame/ses-1839 (pull request #139)

SES-1839 Don't render "error" span when there is no error message.
Preserve whitespace when parsing sparql-results+xml
Preserve whitespace when parsing transaction XML
SES-1844 : Add queryresultio tests for literals

New literal tests include whitespace, newline, double quotes and single quotes
SES-1844 : Add more tests for tuple results roundtripping

Some of the tests fail in the TSV parser, that seems to be a little lax
with the way it calculates positions so it does not smoothly roundtrip
for new line characters, tab characters, and bindings that start with
double-quotes and have no datatype. 

Might be useful to convert it to using a third-party TSV parser. For
now, the failing tests are commented out.
Merged in SES-1844 (pull request #140)

Preserve literal whitespace in sparql-results+xml and transaction xml
Merge branch '2.7.x'

Conflicts: pom.xml files