check the outputs for cellcount and age prediction

[SiyiSEA]

This pull request is for:

1. Enhance the function of check_upload.sh 03a check to handle the situation when cellcounts_required="yes" and measured_cellcounts="NULL" have been set in the config file;
2. Check all the outputs for 03a.

[SiyiSEA]

If we did force the cellcounts_required = "yes",

Would that be more safe for us to delete the parameter of cellcounts_required in the config file? And update the wiki description about the cell count? https://github.com/genetics-of-dna-methylation-consortium/godmc_phase2/wiki/Install-and-set-up#cell-count-data

I could do them before the merging.

[ejh243]

Currently it seems like recalculation of cell counts is not enforced, i.e. if cellcounts_requiredis set to no, this will be skipped. Should this be the case @epzjlm ?

[ejh243]

Looking at the wiki I wonder if this is because sorted datasets don't need cell composition caluclated? But is this is the case can't we use the sorted_methylation config variable to turn this off? Otherwise we might get whole blood datasets not running this.

[epzjlm]

It might be easer to add a check to script 01 or script 03