#694 Improved dotnet installation

[MeShehi]

This PR fixes #694

Implemented changes:

• Added DOTNET_ROOT environment variable
• Added test for correct setup of environment variables

Testing instructions

Run the cli configuration with the following:

1. uninstall dotnet
2. install dotnet
3. env
4. Check that both DOTNET_HOME and DOTNET_ROOT have an exported path
5. Check also on ide dotnet --info

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Checklist for this PR

Make sure everything is checked before merging this PR. For further info please also see
our DoD.

• When running mvn clean test locally all tests pass and build is successful
• PR title is of the form #«issue-id»: «brief summary» (e.g. #921: fixed setup.bat and not feature/921 fixed setup.bat). If no issue ID exists, title only.
• PR top-level comment summaries what has been done and contains link to addressed issue(s)
• PR and issue(s) have suitable labels
• Issue is set to In Progress and assigned to you or there is no issue (might happen for very small PRs)
• You followed all coding conventions
• You have added the issue implemented by your PR in CHANGELOG.adoc unless issue is labelled
  with internal
• You have not changed any dependency in pom.xml files or otherwise if runtime dependencies changed, you have updated our LICENSE.asciidoc
• You have formulated clear instructions on how to test your contribution under "Testing instructions"

[coveralls]

Coverage Report for CI Build 32138093453

Coverage decreased (-0.009%) to 72.92%

Details

• Coverage decreased (-0.009%) from the base build.
• Patch coverage: No coverable lines changed in this PR.
• 2 coverage regressions across 2 files.

Uncovered Changes

No uncovered changes found.

Coverage Regressions

2 previously-covered lines in 2 files lost coverage.

File	Lines Losing Coverage	Coverage
com/devonfw/tools/ide/tool/dotnet/DotNet.java	1	83.33%
com/devonfw/tools/ide/version/VersionSegment.java	1	90.55%

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Coverage Stats

Relevant Lines:	17559
Covered Lines:	13355
Line Coverage:	76.06%
Relevant Branches:	7759
Covered Branches:	5107
Branch Coverage:	65.82%
Branches in Coverage %:	Yes
Coverage Strength:	3.23 hits per line

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💛 - Coveralls