add possibility to check a decrypted value, before setting a password…

[schneewe]

I added a new task to check and validate a current encrypted value, so wee only set a password value only if they don't match. This results in lesser restarts, because the value is actually not changing. Otherwise in my current runs, the encrypted value gets overwritten, the task results in "changed" and splunk need a restart.

As an example I changed the workflow for the configure_deploymentclient.yml task.