Fixes keytool executable name on Windows

Signed-off-by: Alexander Pinčuk <alexander.v.pinchuk@gmail.com>

appserver/itest-tools/src/main/java/org/glassfish/main/itest/tools/GlassFishTestEnvironment.java

@@ -259,7 +259,7 @@ private static File findAsadmin() {
 
 
     private static File findKeyTool() {
-        return new File(System.getProperty("java.home"), isWindows() ? "bin/keytool.bat" : "bin/keytool");
+        return new File(System.getProperty("java.home"), isWindows() ? "bin/keytool.exe" : "bin/keytool");
     }