Fix shelf name not to have user prefix which built it

[mashoodk]

Shelf names are prefixed with usernames using which it is created.

username@sles-1:~/work/3.0.0_pre/OpenFAM/build> ls /dev/shm/vol/
username_NVMM_EPOCH username_NVMM_ROOT username_NVMM_Shelf_0_17 username_NVMM_Shelf_17_0_1 username_NVMM_Shelf_17_1_1

Instead of username it would be better if the shelfs are named as fam or something like that.