RFR: 8194960: Add a test for trust manager and cacerts keystore sanity

[Weijun Wang]

Hi Martin

This is fine as a test. I don't know which is the recommended call, but "keytool -list -cacerts" also does it.

BTW, usually we add braces even if there is only one statement in an if block.

Thanks
Max

> On Jan 12, 2018, at 12:29 PM, Martin Buchholz <martinrb at google.com> wrote:
> 
> https://bugs.openjdk.java.net/browse/JDK-8194960
> http://cr.openjdk.java.net/~martin/webrevs/jdk/CacertsExplorer/
> 
> I have no idea what I'm doing, so review this carefully.
> Is this really the recommended way to list all the cacerts?