Install composer viea phive and remove phpunit from composer dev install

Update comoser test files to work with both, but primary is the phive
installed one.

run tests via 4dev/check/phpunit.sh as before

phpunit.xml

@@ -3,5 +3,6 @@
 	colors="true"
 	verbose="true"
 	convertDeprecationsToExceptions="true"
+	bootstrap="4dev/tests/bootstrap.php"
 >
 </phpunit>