Remove some 1.2 specific code
Remove some 1.2 specific code

Now that we dropped 1.2 compatibility, we can removed the special casing
for RAPI differences.

apyrgio/ganeti,ganeti/ganeti,andir/ganeti,yiannist/ganeti,apyrgio/ganeti,andir/ganeti,ganeti/ganeti,onponomarev/ganeti,bitemyapp/ganeti,dimara/ganeti,ganeti-github-testing/ganeti-test-1,grnet/snf-ganeti,mbakke/ganeti,mbakke/ganeti,dimara/ganeti,ganeti/ganeti,yiannist/ganeti,leshchevds/ganeti,mbakke/ganeti,apyrgio/snf-ganeti,andir/ganeti,onponomarev/ganeti,leshchevds/ganeti,bitemyapp/ganeti,leshchevds/ganeti,yiannist/ganeti,ganeti-github-testing/ganeti-test-1,grnet/snf-ganeti,apyrgio/snf-ganeti