Activate multipath in case of forced by the user and fix environment file typo

[teclator]

Problem

• The agama service have a typo in the EnvironmentFile variable name.
• Agama is not checking if the user is forcing multipath through a environment variable.

Solution

Fix the typo and check if multipath is forced.

Testing

• Tested manually

[joseivanlopez]

Please, add a changelog entry.

[teclator]

Ups, already added but not commited :P

[ancorgs]

LGTM

[joseivanlopez]

LGTM

[coveralls]

Pull Request Test Coverage Report for Build 12689848198

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 2 of 2 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+46.2%) to 70.981%

---

Totals
Change from base Build 12686008794:	46.2%
Covered Lines:	17164
Relevant Lines:	24181

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 12689936143

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 2 of 2 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+46.2%) to 70.981%

---

Totals
Change from base Build 12686008794:	46.2%
Covered Lines:	17164
Relevant Lines:	24181

---

💛 - Coveralls