Add a way to prevent conflicting modules to be activated

[celinenilla]

Conflicting modules, such as spp_base (SP-MIS) and spp_farmer_base (Farmer Registry), can be activated by the admin user via the Odoo "Apps" UI. This could lead to errors due to conflicts between the modules. To prevent these issues, a pre_init_hook should be implemented in each conflicting module. The hook will contain a function that checks for the presence of the other conflicting module and prevents activation if it's already installed.

An alternative for this is to use "excludes" in manifest.py.

[celinenilla]

@kneckinator , can you please help advise on which of the two alternatives above we should pick?

[kneckinator]

@gonzalesedwin1123 suggested we try the excludes section in the manifest first, then explore the pre_init_hook if excludes does not give us the expected results. I agree with that suggestion.

[gonzalesedwin1123]

@kneckinator @celinenilla after trying the excludes section in the manifest, I discovered that it is doing what is needed.

[gonzalesedwin1123]

I have completed this. Installing conflicting modules will display this:

[jannahadlaon]

Findings: Return to devs - testing Blocked
Installing the modules below raised errors
spp_change_request_add_children_demo
spp_change_request_add_farmer

STEPS:
1.
Install spp_base then install spp_farmer_registry_base - PASS
Error message should popup

Install spp_farmer_registry_base then install spp_base - PASS

Install spp_change_request_add_children_demo then install spp_farmer_registry_base - FAIL
Error occurred when installing spp_change_request_add_children_demo

Install spp_farmer_registry_base then install spp_change_request_add_children_demo - PASS

3. Installing spp_change_request_add_farmer conflicts with spp_base - FAIL
   Error occurred when installing spp_change_request_add_farmer
   

Installing spp_base conflicts with spp_change_request_add_farmer - PASS

4. Installing spp_farmer_registry_default_ui conflicts with spp_base - PASS
   
   Installing spp_base conflicts with spp_farmer_registry_default_ui- PASS
   

5. Installing spp_farmer_registry_demo conflicts with spp_base - PASS
   

Installing spp_base conflicts with spp_base spp_farmer_registry_demo- PASS

@gonzalesedwin1123 @emjay0921