update install-grinder jobs to use short workspace & INSTALL_PLAN instead of groovy environment variable hack

Started by user nboldt@REDHAT.COM
[EnvInject] - Loading node environment variables.
[EnvInject] - Preparing an environment for the build.
[EnvInject] - Keeping Jenkins system variables.
[EnvInject] - Keeping Jenkins build variables.
[EnvInject] - Adding build parameters as variables.
[EnvInject] - Evaluation the following Groovy script content: 
// Horrible hack to set PRODUCT !
import hudson.model.*

def thr = Thread.currentThread()
def build = thr?.executable
def resolver = build.buildVariableResolver
def url = resolver.resolve("INSTALL_URL")
String product = url.contains("devstudio") ? "devstudio" : "jbosstools"
String proto = url.contains("devstudio.jboss.com") ? "https" : "http"

[PRODUCT: product, PROTO: proto]

[EnvInject] - [ERROR] - SEVERE ERROR occurs: No such property: executable for class: hudson.model.OneOffExecutor
Notifying upstream projects of job completion
Finished: FAILURE

Started by user nboldt@REDHAT.COM
[EnvInject] - Loading node environment variables.
[EnvInject] - Preparing an environment for the build.
[EnvInject] - Keeping Jenkins system variables.
[EnvInject] - Keeping Jenkins build variables.
[EnvInject] - Adding build parameters as variables.
[EnvInject] - Evaluation the following Groovy script content: 
// Horrible hack to set PRODUCT !
import hudson.model.*

def thr = Thread.currentThread()
def build = thr?.getCurrentExecutable()
def resolver = build.buildVariableResolver
def url = resolver.resolve("INSTALL_URL")
String product = url.contains("devstudio") ? "devstudio" : "jbosstools"
String proto = url.contains("devstudio.jboss.com") ? "https" : "http"

[PRODUCT: product, PROTO: proto]

[EnvInject] - [ERROR] - SEVERE ERROR occurs: Cannot invoke method contains() on null object
Notifying upstream projects of job completion
Finished: FAILURE