Implement simple runtime updates for the xo_vm resource

This is to address #35

Todo

[ ] ~Figure out a better way to watch the vm.set eventual consistency~ Going to hold off on this for now. It seems that the current_operations field could be of use here
[x] make testacc passes
[x] Update documentation
[x] Add validation for high_availability (should only allow specific string values).
[x] Created #42 because I realized that the terraform provider does not correctly show jsonrpc errors to the user

# Test output
ddelnano@ddelnano-desktop:~/go/src/github.com/ddelnano/terraform-provider-xenorchestra$ make testacc
TF_ACC=1 go test ./... -v
?       github.com/ddelnano/terraform-provider-xenorchestra     [no test files]
=== RUN   TestGetPIFByDevice
--- PASS: TestGetPIFByDevice (0.75s)
=== RUN   TestPoolCompare
--- PASS: TestPoolCompare (0.00s)
=== RUN   TestGetPoolByName
--- PASS: TestGetPoolByName (0.15s)
=== RUN   TestStorageRepositoryCompare
--- PASS: TestStorageRepositoryCompare (0.00s)
=== RUN   TestGetStorageRepositoryByType
--- PASS: TestGetStorageRepositoryByType (0.14s)
=== RUN   TestGetTemplate
--- PASS: TestGetTemplate (0.21s)
=== RUN   TestThatUnmarshalingWorks
--- PASS: TestThatUnmarshalingWorks (0.00s)
=== RUN   TestUnmarshalingVmObject
--- PASS: TestUnmarshalingVmObject (0.00s)
PASS
ok      github.com/ddelnano/terraform-provider-xenorchestra/client      1.256s
=== RUN   TestAccXenorchestraDataSource_pool
--- PASS: TestAccXenorchestraDataSource_pool (1.13s)
=== RUN   TestAccXenorchestraDataSource_pif
--- PASS: TestAccXenorchestraDataSource_pif (0.65s)
=== RUN   TestAccXenorchestraDataSource_storageRepository
--- PASS: TestAccXenorchestraDataSource_storageRepository (0.68s)
=== RUN   TestAccXenorchestraDataSource_storageRepositoryWithPoolId
--- PASS: TestAccXenorchestraDataSource_storageRepositoryWithPoolId (0.66s)
=== RUN   TestAccXenorchestraDataSource_storageRepositoryWithNonExistantPoolId
--- PASS: TestAccXenorchestraDataSource_storageRepositoryWithNonExistantPoolId (0.80s)
=== RUN   TestAccXenorchestraDataSource_template
--- PASS: TestAccXenorchestraDataSource_template (0.74s)
=== RUN   TestAccXenorchestraCloudConfig_readAfterDelete
--- PASS: TestAccXenorchestraCloudConfig_readAfterDelete (1.69s)
=== RUN   TestAccXenorchestraCloudConfig_create
--- PASS: TestAccXenorchestraCloudConfig_create (0.91s)
=== RUN   TestAccXenorchestraCloudConfig_updateName
--- PASS: TestAccXenorchestraCloudConfig_updateName (1.51s)
=== RUN   TestAccXenorchestraCloudConfig_updateTemplate
--- PASS: TestAccXenorchestraCloudConfig_updateTemplate (1.53s)
=== RUN   TestAccXenorchestraCloudConfig_import
--- PASS: TestAccXenorchestraCloudConfig_import (1.07s)
=== RUN   TestAccXenorchestraVm_create
--- PASS: TestAccXenorchestraVm_create (125.60s)
=== RUN   TestAccXenorchestraVm_updatesWithoutReboot
--- PASS: TestAccXenorchestraVm_updatesWithoutReboot (182.81s)
PASS
ok      github.com/ddelnano/terraform-provider-xenorchestra/xoa 319.809s

vatesfr / terraform-provider-xenorchestra

Implement simple runtime updates for the xo_vm resource #41

Todo