Fix datetime validation
Delete strict-rfc package and validation. Use data-time types as in Indexer: https://community.opengroup.org/osdu/platform/system/indexer-service/-/blob/master/indexer-core/src/test/java/org/opengroup/osdu/indexer/util/parser/DateTimeParserTest.java#L31
closes #2 (closed)
Edited by Siarhei Khaletski (EPAM)