Reduce the noisy logging in the tango device

[kmadisa]

This usually occurs in the attribute's write methods. If the attribute gets written frequently it results in a lot of noise in the logs.

Screenshots or code snippets (if appropriate):

Definition of Done Checklist

• Code meets our python style guidelines?
• Unit tested (coded, passed, included)?
• Requested at least 2 reviewers?
• Commented code, particularly in hard-to-understand areas?
• Made corresponding changes to the documentation (e.g. Python documentation, System Engineering Documentation, version description updates, README file, etc)?

(SKA) JIRA: SAR-233

[samueltwum1]

LGTM