update sambamba to 0.6.9

src/conda_packages.sh

src/docker_modules/sambamba/0.6.9/Dockerfile

src/docker_modules/sambamba/0.6.9/docker_init.sh

src/nf_modules/sambamba/index_bams.config

src/nf_modules/sambamba/sort_bams.config

src/nf_modules/sambamba/split_bams.config

src/psmn_modules

src/singularity_modules/sambamba/0.6.9/build.sh

src/singularity_modules/sambamba/0.6.9/sambamba

src/singularity_modules/sambamba/0.6.9/sambamba.def