#171: support for multiple VariableSyntax styles

[hohwille]

fixes #171

• Add VariableSyntax enum incl. test
• Extend EnvironmentVariables by adding resolve method variant with boolean legacySupport for workspace merger
• Add IdeVariables.IDE_VARIABLE_SYNTAX_LEGACY_SUPPORT_ENABLED
• Extend workspace FileMerger and implementations to use this new variable
• Refactor AbstractEnvironmentVariables implemeting resolve and inverseResolve methods.
• Improve logging, change log-level dynamically for legacy support case

[coveralls]

Pull Request Test Coverage Report for Build 9613602697

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 68 unchanged lines in 6 files lost coverage.
• Overall coverage increased (+0.01%) to 60.682%

---

Files with Coverage Reduction	New Missed Lines	%
com/devonfw/tools/ide/merge/FileMerger.java	4	33.33%
com/devonfw/tools/ide/environment/EnvironmentVariables.java	7	81.36%
com/devonfw/tools/ide/merge/xmlmerger/XmlMerger.java	10	77.78%
com/devonfw/tools/ide/merge/JsonMerger.java	12	77.33%
com/devonfw/tools/ide/merge/PropertiesMerger.java	15	41.67%
com/devonfw/tools/ide/environment/AbstractEnvironmentVariables.java	20	78.24%

Totals
Change from base Build 9610011440:	0.01%
Covered Lines:	4972
Relevant Lines:	7883

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 9615912827

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 130 unchanged lines in 9 files lost coverage.
• Overall coverage decreased (-0.06%) to 60.613%

---

Files with Coverage Reduction	New Missed Lines	%
com/devonfw/tools/ide/merge/FileMerger.java	4	33.33%
com/devonfw/tools/ide/environment/EnvironmentVariables.java	7	81.36%
com/devonfw/tools/ide/context/IdeContext.java	7	45.28%
com/devonfw/tools/ide/merge/xmlmerger/XmlMerger.java	10	77.78%
com/devonfw/tools/ide/merge/JsonMerger.java	12	77.33%
com/devonfw/tools/ide/merge/PropertiesMerger.java	15	41.67%
com/devonfw/tools/ide/environment/AbstractEnvironmentVariables.java	20	78.24%
com/devonfw/tools/ide/step/Step.java	20	36.36%
com/devonfw/tools/ide/tool/mvn/Mvn.java	35	41.54%

Totals
Change from base Build 9610011440:	-0.06%
Covered Lines:	4981
Relevant Lines:	7905

---

💛 - Coveralls

[hohwille]

@slskiba did some review and could not find concerns but also not verify all changes as reported today in daily meeting.
I will merge this today as we need this feature for devonfw/ide-settings#51.

[coveralls]

Pull Request Test Coverage Report for Build 9660943470

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 130 unchanged lines in 9 files lost coverage.
• Overall coverage decreased (-0.06%) to 60.42%

---

Files with Coverage Reduction	New Missed Lines	%
com/devonfw/tools/ide/merge/FileMerger.java	4	33.33%
com/devonfw/tools/ide/environment/EnvironmentVariables.java	7	81.36%
com/devonfw/tools/ide/context/IdeContext.java	7	45.28%
com/devonfw/tools/ide/merge/xmlmerger/XmlMerger.java	10	77.78%
com/devonfw/tools/ide/merge/JsonMerger.java	12	77.33%
com/devonfw/tools/ide/merge/PropertiesMerger.java	15	41.67%
com/devonfw/tools/ide/environment/AbstractEnvironmentVariables.java	20	78.24%
com/devonfw/tools/ide/step/Step.java	20	36.36%
com/devonfw/tools/ide/tool/mvn/Mvn.java	35	41.54%

Totals
Change from base Build 9658247376:	-0.06%
Covered Lines:	4985
Relevant Lines:	7942

---

💛 - Coveralls