eager is not compatible with Nextflow 21.04

[jfy133]

The following error is found on start up

:dna: 21:10:48 with 6GiB/15GiB in eager/tests on  bcftools [!] ✖  nextflow run nf-core/eager -r 2.3.4 -profile conda,test_tsv --run_genotyping --genotyping_tool 'ug' --run_bcftools_stats --run_multivcfanalyzer --run_vcf2genome -with-tower
N E X T F L O W  ~  version 21.04.0
Launching `nf-core/eager` [trusting_stonebraker] - revision: 10bfbdff86 [2.3.4]
Unknown method invocation `isEmpty` on Boolean type

Possibly related to: nf-core/tools#992 (comment)

Should change all empty strings to null, and check validations still work.

[jfy133]

Ok actually seems to be with the -profile conda, but should do clean up anyway

[jfy133]

This was a bug (I made ) in the template . Should be fixed in the template merge of tools 1.14