[ACR] Add 2018-02-preview version to Java SDK

[djyou]

This checklist is used to make sure that common issues in a pull request are addressed. This will expedite the process of getting your pull request merged and avoid extra work on your part to fix issues discovered during the review process.

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[djyou]

/cc @northtyphoon @jianghaolu @sajayantony

[AutorestCI]

Automation for azure-sdk-for-node

Nothing to generate for azure-sdk-for-node

[AutorestCI]

Automation for azure-sdk-for-python

Nothing to generate for azure-sdk-for-python

[AutorestCI]

Automation for azure-sdk-for-go

The initial PR has been merged into your service PR:
Azure/azure-sdk-for-go#2129

[AutorestCI]

Automation for azure-sdk-for-ruby

Nothing to generate for azure-sdk-for-ruby

[AutorestCI]

Automation for azure-sdk-for-java

The initial PR has been merged into your service PR:
Azure/azure-sdk-for-java#2146

[northtyphoon]

Can you update --azure-libraries-for-java to azure-libraries-for-java-folder? There are several other places using the name.