Need a force function for undeploy (to keep going on error)

_**Goal**: Improve rollback on failed installation, and do not fail on underdeploy if object doesn’t exist due to install failure_

**Scenario**:
In trying to automate wskdeploy Dan Krook found that undeploy hits an error and stops processing leaving server in unknown state. In one example he sent to me...

He deployed a manifest where
- a dependent kafka _Package_ did not exist
- so its _Trigger_ not created
- therefore its associated _Rule_ was not created

undeploy tries to delete Rule (does not exist) and Errors out and stops trying to undeploy at that point

Manifest:
[https://github.com/IBM/ibm-cloud-functions-refarch-data-processing-message-hub/blob/master/runtimes/nodejs/manifest.yaml](https://github.com/IBM/ibm-cloud-functions-refarch-data-processing-message-hub/blob/master/runtimes/nodejs/manifest.yaml)
```
packages:
data-processing-message-hub:
actions:
# Action named "receive-consume"
# Creating action as a regular Node.js action
receive-consume:
function: actions/receive-consume.js
# Action named "transform-produce"
transform-produce:
function: actions/transform-produce.js
inputs:
topic: $DEST_TOPIC
kafka: $KAFKA_INSTANCE
sequences:
# Sequence named "message-processing-sequence"
# Creating the sequence that links the get and post actions
message-processing-sequence:
actions: receive-consume, transform-produce
triggers:
# Creating the message-trigger trigger"
message-trigger:
feed: Bluemix_${KAFKA_INSTANCE}_Credentials-1/messageHubFeed
inputs:
isJSONData: true
topic: $SRC_TOPIC
rules:
# Rule named "message-rule"
# Creating the rule that links the trigger to the sequence
message-rule:
trigger: message-trigger
action: message-processing-sequence
```

output:

**First step: Broken install on trigger**
```
Genet:nodejs krook$ wskdeploy
Info: The API host is [openwhisk.ng.bluemix.net], from .wskprops.
Info: The auth key is set, from .wskprops.
Info: The namespace is [_], from .wskprops.
Info: The apigw access token is set, from .wskprops.
Info: Unmarshal OpenWhisk runtimes from internet at https://openwhisk.ng.bluemix.net.
Warning: The mandatory key [package version] should be set. Using default value [0.0.1]...
Warning: The value for key [package version] is not saved in the current version of wskdeploy.
Warning: The mandatory key [package license] should be set. Using default value [unlicensed]...
Warning: The value for key [package version] is not saved in the current version of wskdeploy.
Info: Deploying package [data-processing-message-hub] ...
Info: package [data-processing-message-hub] has been successfully deployed.

Info: Deploying action [data-processing-message-hub/receive-consume] ...
Info: action [data-processing-message-hub/receive-consume] has been successfully deployed.

Info: Deploying action [data-processing-message-hub/transform-produce] ...
Info: action [data-processing-message-hub/transform-produce] has been successfully deployed.

Info: Deploying action [data-processing-message-hub/message-processing-sequence] ...
Info: action [data-processing-message-hub/message-processing-sequence] has been successfully deployed.

Info: Deploying trigger feed [message-trigger] ...
Error: Deployment did not complete sucessfully. Run `wskdeploy undeploy` to remove partially deployed assets.
Error: servicedeployer.go [1622]: [ERROR_WHISK_CLIENT_ERROR]: Error code: 246: The following application error was received: {}: HTTP Response Status: application error HTTP Response Body: {"duration":768,"name":"messageHubFeed","subject":"krook@us.ibm.com","activationId":"1f8f478e441648218f478e441628210d","publish":false,"annotations":[{"key":"path","value":"whisk.system/messaging/messageHubFeed"},{"key":"waitTime","value":60},{"key":"kind","value":"nodejs:6"},{"key":"limits","value":{"timeout":60000,"memory":256,"logs":10}},{"key":"initTime","value":488}],"version":"0.0.38","response":{"result":{"error":"Error: Document update conflict."},"success":false,"status":"application error"},"end":1520621154257,"logs":[],"start":1520621153489,"namespace":"krook@us.ibm.com_refarch"}
```
**Second step: Undeploy broken on partial install**
```
Info: Undeploying rule [message-rule] ...
Error: Undeployment did not complete sucessfully.
Error: servicedeployer.go [1622]: [ERROR_WHISK_CLIENT_ERROR]: Error code: 148: The requested resource does not exist. (code 328091): HTTP Response Status: 404 Not Found HTTP Response Body: {"error":"The requested resource does not exist.","code":328091}
```

expected:
```
Genet:bx-wsk krook$ ./deploy.sh --uninstall
Uninstalling...
error: Unable to disable rule 'message-rule': The requested resource does not exist. (code 6201033)
error: Unable to get trigger 'message-trigger': The requested resource does not exist. (code 338338)
ok: deleted action data-processing-message-hub/message-processing-sequence
```