Add feature to mask an ip v4 address, with tests
[FEATURE] Log Customer logouts
Removed superfluous test mocks in logout test
Changed method names to use camelCase instead of camelCASE
Use lowercase boolean and null constants (my module, my preference)
Added optional constructor DI for store model to helper
Simplify getInstance method - maskIpSetting can be specified on store model in each test if needed
Add getMaskIpSetting method and refactored maskIpAddress() to use it
Remove EcomDev yaml fixtures, providers and expectations for simple tests
Add getStoreMock method with optional maskIpSetting config setting argument
Fix getMaskIpTests
Use DDL method of table alteration, rename column for consistency with login_at
Rename node 'settings' node to more fitting 'privacy'
Add licence header
Fix licence header
Remove copy&paste comment stuff
Move IpMask config source model to system/config for consistency
Refactored and added test coverage
Simplify maskIp test
Point to new source model location