Process change request for adding a tunable

[bharathappali]

Currently if any tunable is changed in yaml where autotune might not understand how to handle it the pod restart fails, so adding them in a stage by stage fashion helps here. Inspired by the process of appsody stacks

I would like to suggest, adding tunable in 3 stages stable, incubator, experimental

Every newly added tunable needs to go from experimental -> incubator -> stable

• stable - has everything set
• incubator - is having minimal stuff in java to handle , to test and to check
• experimental - will be added to yamls but no java code corresponding to that will be there and these ignored by autotune which avoids crashloopbackoff

[bharathappali]

No longer a priority. Will re-open if needed