Add slightly modified version of GATK3 github issue template (#4796)
Add slightly modified version of GATK3 github issue template (#4796)

Added slightly modified version of GATK3 github issue template

magicDGS/gatk,frank-y-liu/gatk,broadinstitute/hellbender,frank-y-liu/gatk,magicDGS/gatk,broadinstitute/hellbender,magicDGS/gatk,broadinstitute/hellbender,broadinstitute/hellbender,frank-y-liu/gatk,frank-y-liu/gatk,magicDGS/gatk,broadinstitute/hellbender,magicDGS/gatk,ksthesis/gatk,broadinstitute/hellbender,magicDGS/gatk,ksthesis/gatk,frank-y-liu/gatk,ksthesis/gatk,frank-y-liu/gatk,ksthesis/gatk,ksthesis/gatk,ksthesis/gatk