Use getenv over $_ENV

Author: alcaeus

tests/atlas.phpt

@@ -4,7 +4,7 @@ Atlas Connectivity Tests
 <?php
 if (!file_exists('.evergreen/atlas-uris.txt')) { echo "skip Atlas URIs not found\n"; }
 if (filesize('.evergreen/atlas-uris.txt') < 10) { echo "skip Atlas URI file empty\n"; }
-if ($_ENV['TESTS'] !== 'tests/atlas.phpt') { echo "skip Atlas tests not wanted\n"; }
+if (getenv('TESTS') !== 'tests/atlas.phpt') { echo "skip Atlas tests not wanted\n"; }
 ?>
 --FILE--
 <?php

tests/ocsp-failure.phpt

@@ -2,7 +2,7 @@
 Connection with OCSP checks fails
 --SKIPIF--
 <?php
-if ($_ENV['TESTS'] !== 'tests/ocsp-failure.phpt') { echo "skip OCSP tests not wanted\n"; }
+if (getenv('TESTS') !== 'tests/ocsp-failure.phpt') { echo "skip OCSP tests not wanted\n"; }
 ?>
 --FILE--
 <?php

tests/ocsp-success.phpt

@@ -2,7 +2,7 @@
 Connection with OCSP checks successful
 --SKIPIF--
 <?php
-if ($_ENV['TESTS'] !== 'tests/ocsp-success.phpt') { echo "skip OCSP tests not wanted\n"; }
+if (getenv('TESTS') !== 'tests/ocsp-success.phpt') { echo "skip OCSP tests not wanted\n"; }
 ?>
 --FILE--
 <?php