Keywhiz has inconsistencies in filename enforcement

[sqshh]

As evidenced by this output:

keywhiz.cli describe secret --name shh.2016-01-26T23:49:27Z.key
Exception in thread "main" java.lang.IllegalArgumentException: Invalid name, must match ^[a-zA-Z_0-9\-.]+$
    at keywhiz.cli.commands.DescribeAction.run(DescribeAction.java:58)
    at keywhiz.cli.CommandExecutor.executeCommand(CommandExecutor.java:141)
    at keywhiz.cli.CliMain.main(CliMain.java:68)

This secret was added via the automation API and otherwise is served and is displayed correctly.

[alokmenghrajani]

We should remove the check in the cli and enforce (if we wish to) on the server side. Given that the secrets end up being accessed via a file system API, limiting the name to some subset of characters we know work across platforms is probably going to be a good idea.