updated test repo used by org.eclipse.m2e.editor.xml.tests

Signed-off-by: Igor Fedorenko <igor@ifedorenko.com>
updated editor tests to match 1.5 changes

Signed-off-by: Igor Fedorenko <igor@ifedorenko.com>
fixed ProjectRegistryManagerTest#testEnvironmentVariablesConsidered

Signed-off-by: Igor Fedorenko <igor@ifedorenko.com>