#1703 allow snapshot usage

[SDallmann]

This PR fixes #1703

In order to be able create projects while using the SNAPSHOT version, said version was permitted during the verification of the minimum required version. This change affected some Unit Tests, which had to be adapted.

Implemented changes:

1. In .../AbstractIdeContext.java: allowed SNAPSHOT during the verification of the minimum required version.
2. In .../IdeVersion.java: added a method to mock the current version from SNAPSHOT to a specific version (setMockVersionForTesting(..)) and a method to reset the version back to SNAPSHOT (setSnapshotVersionForTesting()).
3. Moved and renamed the test testIdeVersionTooSmall() from .../IdeContextTest.java to .../CreateCommandletTest.java as testIdeVersionTooOldForExistingProject().
4. Renamed the test testIdeVersionTooSmall() from .../CreateCommandletTest.java to testIdeVersionTooOldOnProjectCreation().
5. Adapted both tests from 3. and 4. to use the methods added in 2.

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[coveralls]

Pull Request Test Coverage Report for Build 21754609702

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 39 unchanged lines in 3 files lost coverage.
• Overall coverage increased (+0.005%) to 70.451%

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Files with Coverage Reduction	New Missed Lines	%
com/devonfw/tools/ide/git/GitUrl.java	3	87.93%
com/devonfw/tools/ide/context/AbstractIdeContext.java	16	67.19%
com/devonfw/tools/ide/commandlet/AbstractUpdateCommandlet.java	20	82.04%

Totals
Change from base Build 21513109358:	0.005%
Covered Lines:	10496
Relevant Lines:	14312

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💛 - Coveralls