* Adapted code to allow '.' inside of metadata key and attribute names Signed-off-by: Markus Block <markus.block@bosch-si.com> * added handling of corner cases Signed-off-by: Markus Block <markus.block@bosch-si.com> * Adapted metadata and attribute tests to check that dot is allowed Signed-off-by: Markus Block <markus.block@bosch-si.com> * fixed documentation Signed-off-by: Markus Block <markus.block@bosch-si.com> * Allow usage of dot in key names for every map attribute, e.g. also for metadata in distribution set Signed-off-by: Markus Block <markus.block@bosch-si.com> * fixed typo Signed-off-by: Markus Block <markus.block@bosch-si.com> * adapted test key to ensure a dot can be used Signed-off-by: Markus Block <markus.block@bosch-si.com> * fixed typo Signed-off-by: Markus Block <markus.block@bosch-si.com>