[2226] Return rcode=REFUSED to serve qtype=RRSIG queries
[2226] Add unittest and lettuce test for qtype=RRSIG query
[1796] Move A_AND_AAAA to the Query class
[2299] Use the shortcut DomainTree::find() for finding wildcard
[2539] Implement getSOA() in InMemoryClient iterator
[1397] Change EXPECT_EQ to ASSERT_EQ
[1397] Fix variable that's tested
[1397] Add std::string version of Rset::addRdata()
[3282] Fixed setDomainName methods

Modified the setDomainName() method in both Option4ClientFqdn
and Option6ClientFqdn to always the domain name type based
on the type parameter passed in.
[3295] Function which processes FQDN option appends it to server's answer.
[3295] Propagate Client FQDN within server's response message.
[3295] Removed unused function which included Client FQDN option.
[3282] Added FQDN processing logic to D2ClientMgr

Methods were added to D2ClientMgr which work for v4 and v6 to
determine the server values for FQDN flags and domain names based
upon the client FQDN and configuration options.
[3282] Added D2ClientMgr accessor to CfgMgr

Added an accessor to CfgMgr to return a reference to the singlton's
D2ClientMgr instance.
[3282] Addes support for full parsing of disable dhcp-ddns entry

D2CLientConfigParser now supports parsing all parameters even if
enable-updates is false.  This allows values like generated-prefix
and qualifying-suffix to be used even if udpates are turned off.
The parser still supports an abbreviated dhcp-ddns entry that has only
enable-updates defined as false.
[3282] Use DDNS configuration values in b10-dhcp4

Replaced hard-coded constants in dhcp4_srv.cc with methods and
logic in D2ClientMgr to implement behavior changes based on
dhcp-ddns configuration values.
[3295] Function which creates Name Change Request takes FQDN from message.
[3295] Propagate FQDN option within reply message for renew functions.
[3295] A function which processes Client FQDN option is now void.
[3295] Removed unused constant from DHCPv6 server code.