remove duplicated code in ceph_bcache module

[chengtcli]

Remove redundant code in ceph_bcache module

[bbc-jenkins]

Can one of the admins verify this patch?

• \"ok to test\" to accept this pull request for testing
• \"test this please\" for a one time test run
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[bbc-jenkins]

Can one of the admins verify this patch?

• \"ok to test\" to accept this pull request for testing
• \"test this please\" for a one time test run
• \"add to whitelist\" to add the author to the whitelist

[bbc-jenkins]

Can one of the admins verify this patch?

• \"ok to test\" to accept this pull request for testing
• \"test this please\" for a one time test run
• \"add to whitelist\" to add the author to the whitelist

[nirajdp76]

please add description to PR

[nirajdp76]

ok to test