Revert "Fix gateway quality rrd to have the correct granularity and be consistent with the pfSense graphs set."

This reverts commit a8d262f63c4574f40f5f299a2e9f746986dc966a.

put the create_gateway_quality_rrd function in rrd.inc instead.
Revert "Revert "Fix gateway quality rrd to have the correct granularity and be consistent with the pfSense graphs set.""

This reverts commit 304ea841cff40aacaac084a0eb6c145ddd034303.
Merge branch 'RELENG_2_1' of git://github.com/pfsense/pfsense into RELENG_2_1
RRD Specify RRA and Resolution

Don't leave it up to RRD Tool to select the RRA and resolution to use.
Specify the RRA and resolution to use per the graph havg value.
Merge pull request #675 from N0YB/RRD_Specify_RRA_Resolution

RRD Specify RRA and Resolution