hg: jdk10/sandbox/jdk: 8183509: keytool should not allow multiple commands

[chris.hegarty at oracle.com]

Changeset: 7bdb59123fe5
Author:    weijun
Date:      2017-07-08 14:09 +0800
URL:       http://hg.openjdk.java.net/jdk10/sandbox/jdk/rev/7bdb59123fe5

8183509: keytool should not allow multiple commands
Reviewed-by: mullan, vinnie

! src/java.base/share/classes/sun/security/tools/keytool/Main.java
! src/java.base/share/classes/sun/security/tools/keytool/Resources.java
+ test/sun/security/tools/keytool/DupCommands.java
! test/sun/security/tools/keytool/WeakAlg.java