change tools name to lowercase

apps/sratoolkit/install_2.8.2.sh

apps/tophat/install_2.1.1.sh

apps/trimmomatic/install_0.36.sh

apps/urqt/install_d62c1f8.sh

modulefiles/bcftools/1.7.lua

modulefiles/bedtools/2.25.0.lua

modulefiles/bowtie2/2.3.2.lua

modulefiles/bowtie2/2.3.4.1.lua

modulefiles/cdhit/4.6.8

modulefiles/deeptools/3.0.2.lua

modulefiles/fastqc/0.11.5.lua

modulefiles/gatk/4.0.10.1.lua

modulefiles/gcc/4.9.4.lua

modulefiles/gcc/5.4.0.lua

modulefiles/gcc/6.4.0.lua

modulefiles/gcc/7.2.0.lua

modulefiles/gcc/default

modulefiles/htseq/0.8.0.lua

modulefiles/htseq/0.9.1.lua

modulefiles/java/1.7.0_21.lua