Include file size in indexed data

Note: requires iIndexThreddsResources and iIndexFiles metadata to be updated in existing jobs
to include size in the metadata connection element before they will compile as follows:

      <column defaultValue= key=false length=0 name=fileSize nullable=true precision=0 sourceType= type=id_Double/>

Refer iIndexFiles_1 node definition in process/ArgoHarvester/ArgoHarvest_0.1.item in NETCDFHARVESTER repository
Make internal size column name consistent with iIndexFiles
Make internal size column name consistent with iIndexFiles
Merge pull request #17 from aodn/index-file-size

Index file size