ZCS-11191: [Backend] Integrate postsrsd

[carlosromero03]

Problem

This PR has the solution for ZCS-11191, which is about to implement a mechanism to enable/disable the PostSRSd service in Zimbra.

Solution

• It's necessary to integrate the PostSRSd service into zimbraServiceEnabled LDAP property.
• When "postsrs" service is present in the zimbraServiceEnabled list, the service has to be enabled.
• When "postsrs" service is not present in the zimbraServiceEnabled list, the service has to be disabled.
• The enable/disable process is doing by calling Linux commands from Java code into the ModifyServer.java class.

Notes

• It's necessary to have "postsrsd" daemon installed into Zimbra 9.0.0+. You can follow the steps explained in ZCS-11193, where you will find the .deb package to be installed.
• Even when this solution seems to work, I was talking with Stephan and he told me there was a defined pattern to enable/disable services into the zm-core-utils project. This part is not implemented yet.

Testing Done

This solution can be tested following the next steps:

• Login to AdminConsole
• Go to Home > Configure > Servers > [your_server] > Services
• A list of services will be displayed. These services can be enabled/disabled using their respective checkbox and hitting the “Save” button.
• Because of the absence of a checkbox for “postsrs” service, you can use the "edit and resend" tool from Mozilla Firefox. Just open the DevTools, right click on the ModifyServerRequest, add the new service "postsrs" to the zimbraServiceEnabled list, and finally hit the “Send” button again.
• I have tested 4 possible scenarios and documented them on the ZCS-11191.PDF file, which you can find on JIRA ticket.

[CLAassistant]

All committers have signed the CLA.

[silentsakky]

any reason to put this into LC instead of LDAP? are we planning to release this feature in a patch?

[silentsakky]

is this going to be called with every modifyServer call?

[swaatiTelus]

@silentsakky, I think the same this code should not be here, as zmcontrol and all other service's stop/start functionality is written in zm-core-utils repo, which is in Perl script. This logic should also be written in that repo, also would like to confirm the same with @desouzas .
@desouzas : Could you please provide your inputs here? Thanks..!!