Ports should be according to IANA ports

GlusterFS 3.4.x onwards uses 49152+ as a IANA expose those ports only
and also expose all the ports mentioned in

https://access.redhat.com/site/documentation/en-US/Red_Hat_Storage/2.1/html-single/Administration_Guide/index.html#idm64770880
Script modifications for proper gluster changes

- start rpcbind at start always
- start glusterd using RC service
- Always create a sub-directory inside a bind mount-point
Add additional packages

- Add glusterfs-fuse to be installed always
- Add nfs-utils to be installed for NFS related tools
- Avoid installing docs with '--setopt=tsflags=nodocs'
Merge pull request #1 from harshavardhana/master

Some needed changes