FileUtils.TestServerNamesDefaultFileName_get uses '… + @"\\" + …'
construct to build the default path for the test server names file.
While escaping a backslash in a verbatim string is a typo, the
approach was error-prone. Replace string manipulation and environment
variables magic with calls to well-tested library functions.
GetSettingFileContent() displays a message on switching to VS Code
settings when SQL connection instances were configured.
Move the message to the branch for the absent test configuration file.
* added a new tool to store SQL connections locally. Modified the peek definition tests to create test database before running test
* fixed failing test QueryExecutionPlanInvalidParamsTest
* Fixes based on code review comments
* fixed failing test GetSignatureHelpReturnsNotNullIfParseInfoInitialized
