aQute.libg: move tests under test folder

Signed-off-by: Ferry Huberts <ferry.huberts@pelagic.nl>
aQute.libg: fixup ReplacerTest after the move to the test folder

Signed-off-by: Ferry Huberts <ferry.huberts@pelagic.nl>
aQute.libg: move tests into correct packages

Signed-off-by: Ferry Huberts <ferry.huberts@pelagic.nl>
aQute.libg: fixup ReplacerTest after move the move into packages

Signed-off-by: Ferry Huberts <ferry.huberts@pelagic.nl>
aQute.libg: organise imports in the tests

Signed-off-by: Ferry Huberts <ferry.huberts@pelagic.nl>
aQute.libg: fix a few warnings in the tests

Signed-off-by: Ferry Huberts <ferry.huberts@pelagic.nl>