SES-2076 : Make it possible to build without running any tests
SES-2076 : Manage version for failsafe plugin
SES-2076 : Make failsafe actually run tests
SES-2076 : Execute failsafe verify in verify phase

Without this, test failures during the integration-test phase do not fail the build.
Merge branch '2.7.x' into SES-2076
Merged in SES-2076 (pull request #294)

SES-2076 : Make it possible to build without running any tests
SES-2086 : Test failure with Turtle localname ending with period
SES-2087 : Add regression test showing Trig and Turtle writers failing

Failures are on the period statements
SES-2086 : Fix TurtleUtil.findURISplitIndex to check last character

RDF-1.1 Turtle puts extra conditions on the last character, in order to
allow periods in the intervening characters without being actually
ambiguous.
Merged in SES-2086 (pull request #301)

SES-2086 : Fix TurtleWriter writing localnames ending in periods