Add picard command in the ConsensusCruncher.py

[arnavaz]

Is your feature request related to a problem? Please describe.

Removing the readgroup arguments in the bwa aligner command and add Picard AddReplaceReadgroups after the bam file is created.

Describe the solution you'd like
java -jar picard.jar AddOrReplaceReadGroups RGID=4
RGLB=lib1
RGPL=ILLUMINA
RGPU=unit1
RGSM=20

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