feat(ruby): collect the logs at the end of the installation

[imobachgs]

Problem

Agama does not copy the logs to the installed system, so they are lost. Additionally, the /var/log/agama-installation permissions are way too open.

Solution

• Save the logs into the installed system.
• Set the proper permissions (700) to the /var/log/agama-installation folder (/var/log/agama-installation permission #2140).

Testing

• Added a new unit test
• Tested manually

[dgdavid]

There is an orphan test failing at manager now.

agama/service/test/agama/manager_test.rb

Lines 237 to 240 in 5b8933e

	it "collects the logs" do
	expect(subject).to receive(:collect_logs)
	subject.finish_installation(method)
	end

[coveralls]

Pull Request Test Coverage Report for Build 13810391035

Details

• 12 of 12 (100.0%) changed or added relevant lines in 2 files are covered.
• 10 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+0.004%) to 72.674%

---

Files with Coverage Reduction	New Missed Lines	%
service/service/lib/agama/storage/finisher.rb	2	98.65%
service/service/lib/agama/manager.rb	8	85.92%

Totals
Change from base Build 13746429284:	0.004%
Covered Lines:	19906
Relevant Lines:	27391

---

💛 - Coveralls

[dgdavid]

Thanks for catching the wrong target branch. Not it looks better :)