Add expectedCount to toString return value

Previously when using `assertThat` with `logicalOr` and one of the constraints was `PHPUnit_Framework_Constraint_Count`, the error message was without values (count is greater than  or count matches .)
Merge pull request #1528 from koenpunt/count-to-string-value

Add expectedCount to toString return value
Merge branch '4.4' into 4.5
Merge branch '4.5'
Redirect STDERR to STDOUT when running PHPT tests

This is the current behaviour of the "run-tests.php" script which runs
all entire PHP source test suite.