Port msiCopyAVUMetadata to 4.2

[rwmoore]

Needed for federation policies

[rwmoore]

Replaced with policy:

*Q2 = select META_DATA_ATTR_NAME, META_DATA_ATTR_VALUE, META_DATA_ATTR_UNITS where DATA_ID = '*DataID';
foreach (*R2 in *Q2) {
    *Attn = *R2.META_DATA_ATTR_NAME;
    *Attv = *R2.META_DATA_ATTR_VALUE;
    *Attu = *R2.META_DATA_ATTR_UNITS;
    # This policy uses a micro-service developed by the iPlant Collaborative
    msiSetAVU ("-d", *Dest1, *Attn, *Attv, *Attu);