Close #3784

[kappu72]

Description

The mapSync functionality is enabled by default

Issues

• Enable map sync by default  #3784

Please check if the PR fulfills these requirements

• The commit message follows our guidelines: https://github.com/geosolutions-it/MapStore2/blob/master/CONTRIBUTING.md
• Tests for the changes have been added (for bug fixes / features)
• [] Docs have been added / updated (for bug fixes / features)

What kind of change does this PR introduce? (check one with "x", remove the others)

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Other... Please describe:

What is the current behavior? (You can also link to an open issue here)
MapSync is disabled by default and can be toggle

What is the new behavior?
MapSync is enabled by default and can be toggle

Does this PR introduce a breaking change? (check one with "x", remove the other)

• Yes, and I documented them in migration notes
• No

If this PR contains a breaking change, please describe the impact and migration path for existing applications: ...

Other information:

[coveralls]

Coverage increased (+0.01%) to 81.942% when pulling 1d70500 on kappu72:t#3784 into b3b2b02 on geosolutions-it:master.

[offtherailz]

Please add a unit test that verifies correct initialization