ranges: prohibit setting --rid-base with ipa-trust-ad-posix type

We should not allow setting --rid-base for ranges of ipa-trust-ad-posix since we do not perform any RID -> UID/GID mappings for these ranges (objects have UID/GID set in AD). Thus, setting RID base makes no sense.

Since ipaBaseRID is a MUST in ipaTrustedADDomainRange object class, value '0' is allowed and used internally for 'ipa-trust-ad-posix' range type.

No schema change is done.

https://fedorahosted.org/freeipa/ticket/4221
unittests: baserid for ipa-ad-trust-posix idranges

https://fedorahosted.org/freeipa/ticket/4221
ldapupdater: set baserid to 0 for ipa-ad-trust-posix ranges

New updater plugin which sets baserid to 0 for ranges with type ipa-ad-trust-posix

https://fedorahosted.org/freeipa/ticket/4221
idrange: include raw range type in output

iparangetype output is a localized human-readable value which is not suitable for machine-based API consumers

Solved by new iparangetyperaw output attribute which contains iparangetype's raw value
webui: prohibit setting rid base with ipa-trust-ad-posix type

Base RID is no longer editable for ipa-trust-ad-posix range type

Adder dialog:
- Range type selector was moved up because it affects a field above it

Details page:
- Only fields relevant to range's type are visible

https://fedorahosted.org/freeipa/ticket/4221