Adds parameter supports for RMI keystore creation scripts

[loganmzz]

Helps to integrate script into non-interactive process.

Description

Pass script parameters to keytool command

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Motivation and Context

It helps caller to customize key creation and also enable to integrate script into non-interactive process.

How Has This Been Tested?

${JMETER_HOME}/bin/create-rmi-keystore.sh -dname 'o=Foobar' -keypass 'f0o84R!'

%JMETER_HOME%\bin\create-rmi-keystore.bat -dname 'o=Foobar' -keypass 'f0o84R!'

• Linux: Debian 8 (Docker) + Open JDK 8u111
• Windows: 7 Pro + Oracle JDK 8u152

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Screenshots (if appropriate):

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Types of changes

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• My code follows the code style of this project.
• I have updated the documentation accordingly.

[FSchumacher]

Thanks for your contribution.
Would you care to update the docs for the changes and create a new pull request :)