Show test name in results, not node name

This seems to be more useful...although maybe for debugging purposes the node
name would be useful as well.
Add Test::nodeIsBoolLiteral() helper method

Moved and expanded from Tests/TestUseTypeCheckEqualsOnBoolean.php. It can now
check if the node is a boolean literal or if it's specifically true or false.
Use nodeIsBoolLiteral() rather than ad hoc test

Tests/TestSessionRegenFalse.php was using an ad hoc test for a bool
literal. Use the new nodeIsBoolLiteral(). This removes problems with the
parameter being a variable instead of a literal.
Add tests for TestSessionRegenFalse

Uses Mockery to mock the PhpParser\Node.

According to PHPUnit, all code paths are tested.
Merge pull request #15 from redbeardcreator/fix-session-regen-not-object

Fix warning when session regen is not an object
Merge pull request #16 from redbeardcreator/improve-output

Show test name in results, not node name