T6894: Fix failing NTP network-integration Tests (#366)

• tests: ntp: parsed

• tests: ntp tests working with 1.3

• T6894 : test: update 1.4 tests for compatibility

• fix: path replacement, docs, unit tests for 1.3-1.5

• T6894: fix: 1.4+ requires valid hostnames

• fix: update tests to handle deletion

• T6894: separate changelog

• fix: final test fixes