fix: properly handle installer language changes

[imobachgs]

Problem

Problems:

• [x] It is not possible to change the language. See bsc#1233160.
• [x] Changing to Portuguese does not work (it might be related to the code, pt-BR).
• [x] The message while reloading the software translations is in the old language.
• [x] #1724
• [x] #860

Solution

Fix the D-Bus path of the LocaleProxy to the Manager's org.opensuse.Agama1.Locale interface.

Testing

• Tested manually

[dgdavid]

@imobachgs,

According to the PR's description, looks to me you're working on https://trello.com/c/isE3194l/620-agama-translations-not-working-consitently too. Please, have a look.

Thanks for addressing these translation issues.

[coveralls]

Pull Request Test Coverage Report for Build 11825620593

Details

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage remained the same at 71.326%

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Files with Coverage Reduction	New Missed Lines	%
service/lib/agama/storage/manager.rb	1	97.08%
<!--	Total:	1		-->

Totals
Change from base Build 11818318839:	0.0%
Covered Lines:	16895
Relevant Lines:	23687

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💛 - Coveralls