[AGIPD][CORRECT] Set default memory cells to 352

Description

This sets the default number of memory cells to process to the detector's maximum of 352.

How Has This Been Tested?

This value gets overridden when reading the control files, but it looks wrong when reading the reports.

Relevant Documents (optional)

Types of changes

• Refactor (refactoring code with no functionality changes)

Checklist:

Reviewers

@jsztuk @ahmedk

it is fine with me. LGTM ;-).

LGTM

merged

mentioned in commit b687cd33

changed milestone to %3.4.2