Some changes in IPv6 tests
Including only IPv4 and only IPv6 features
Some changes in spelling, and testharnes ipv only
Checking that ipv4 and -ipv6 are not been activated at the same time
Including -g [::1]  in curl to IPs v6
FIX all test harness (except IPv4/IPv6 ones) working
FIX IPv4/IPv6 specific test harness now working
Merge branch 'develop' into feature/ipv6_support

Conflicts:
	CHANGES_NEXT_RELEASE
	src/lib/rest/rest.cpp
FIX typo in variable name in harnessFunctions.sh
Some spelling changes
Merge pull request #176 from telefonicaid/feature/ipv6_support

contextBroker IPv6 support
merge with develop