Add HexString/DottedQuad/Uuid support to IetfYangUtil
HexString is similar to a MacAddress and PhysAddress, hence it is
very simple to support it.
DottedQuad is essentially an Ipv4Address, hence it is almost as
simple to support it, too.
Uuid can be created from java.util.UUID, so that is the input
we are expecting.
JIRA: MDSAL-508
Change-Id: I82abd68b23bf857deeb9a64eefb69164fe6c8b24
Signed-off-by: Robert Varga <robert.varga@pantheon.tech>
(cherry picked from commit
7cbd12d8894b1703b19e70b07436a937a7b8d0bf)