Tests Missing instance-identity

[sghill]

In order to run JenkinsRule tests without stacktraces
As a jpi plugin user
I want the jpi plugin to add org.jenkins-ci.modules:instance-identity where JenkinsRule will be used

Running tests will often print this message to stderr:

12:43:42 java.security.KeyStoreException: JENKINS-41987: no X509Certificate found; perhaps instance-identity module is missing or too old
12:43:42     	at jenkins.slaves.JnlpSlaveAgentProtocol4.<init>(JnlpSlaveAgentProtocol4.java:105)
12:43:42     	at jenkins.slaves.JnlpSlaveAgentProtocol4$$FastClassByGuice$$b470638c.newInstance(<generated>)
12:43:42     	at com.google.inject.internal.cglib.reflect.$FastConstructor.newInstance(FastConstructor.java:40)
12:43:42     	at com.google.inject.internal.DefaultConstructionProxyFactory$1.newInstance(DefaultConstructionProxyFactory.java:61)
12:43:42     	at com.google.inject.internal.ConstructorInjector.provision(ConstructorInjector.java:105)
12:43:42     	at com.google.inject.internal.ConstructorInjector.access$000(ConstructorInjector.java:32)
12:43:42     	at com.google.inject.internal.ConstructorInjector$1.call(ConstructorInjector.java:89)
12:43:42     	at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:115)
12:43:42     	at hudson.ExtensionFinder$GuiceFinder$SezpozModule.onProvision(ExtensionFinder.java:572)
12:43:42     	at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:126)
12:43:42     	at com.google.inject.internal.ProvisionListenerStackCallback.provision(ProvisionListenerStackCallback.java:68)
12:43:42     	at com.google.inject.internal.ConstructorInjector.construct(ConstructorInjector.java:87)
12:43:42     	at com.google.inject.internal.ConstructorBindingImpl$Factory.get(ConstructorBindingImpl.java:267)
12:43:42     	at com.google.inject.internal.ProviderToInternalFactoryAdapter$1.call(ProviderToInternalFactoryAdapter.java:46)
12:43:42     	at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1103)
12:43:42     	at com.google.inject.internal.ProviderToInternalFactoryAdapter.get(ProviderToInternalFactoryAdapter.java:40)
12:43:42     Caused: com.google.inject.ProvisionException: Unable to provision, see the following errors:
12:43:42 
12:43:42     1) Error injecting constructor, java.security.KeyStoreException: JENKINS-41987: no X509Certificate found; perhaps instance-identity module is missing or too old
12:43:42       at jenkins.slaves.JnlpSlaveAgentProtocol4.<init>(JnlpSlaveAgentProtocol4.java:101)