* provider/azurerm: DNS CNAME resource wasn't posting records
Azure changed the API for CNAME at some point and since then we haven't
been creating CNAME records. The API changes from []records to a single
record
This PR changes the schema for dns cnames to have a record parameter and
adds a deprecation warning around records. Talked with @jen20 on this
and we decided that it's currently broken and we should handle this as
part of 0.7 where there are other breaking changes
```
TF_LOG=1 make testacc TEST=./builtin/providers/azurerm
TESTARGS='-run=TestAccAzureRMDnsCNameRecord' 2>~/tf.log
==> Checking that code complies with gofmt requirements...
go generate $(go list ./... | grep -v /vendor/)
TF_ACC=1 go test ./builtin/providers/azurerm -v
-run=TestAccAzureRMDnsCNameRecord -timeout 120m
=== RUN TestAccAzureRMDnsCNameRecord_basic
--- PASS: TestAccAzureRMDnsCNameRecord_basic (97.22s)
=== RUN TestAccAzureRMDnsCNameRecord_subdomain
--- PASS: TestAccAzureRMDnsCNameRecord_subdomain (94.94s)
=== RUN TestAccAzureRMDnsCNameRecord_updateRecords
--- PASS: TestAccAzureRMDnsCNameRecord_updateRecords (116.62s)
```
* Change DNS Records to removed rather than deprecated
Joe Topjian