[RHEL/6] Change naming scheme (0.1-16 => 0.1.16)

Similar like in 494df01ad169bcc4b49cea15ba933909009e2125 change
for Fedora, this change for RHEL is required to be able:
* on one hand to use flexible versioning scheme (have couple of rc
  candidates prior final stable release),
* but on the other have Release: tag to contain just fixed number,
  so it can be easily incremented (in case RHEL- specific update
  would be required without the corresponding upstream change)