Fixed: Read counts for samples on single lane 

* When demuxing samples with 'NoIndex' it will do so twice. First the indexes (--use-bases-mask N101, Y8, N101), then the reads only (Y101, N8, Y101)
* Indexes become 'read1' and 'read2'. Moved them to I1 and I2
* configureBcl2Fastq using --force for the reads only demuxing to overwrite Makefile

Fixes https://github.com/SciLifeLab/bcbb/issues/296