Error when creating Service Desk request with Notify Hipchat post function in Create Issue transition. This might be related to having username that has a combination of uppercase and lowercase letter as well.

Steps to Reproduce

1. Access Customer Portal with a Username that has combination of uppercase and lowercase letters.
2. Tried to create a request with Notify Hipchat post function in the create issue transition
3. Getting an error
   
4. JIRA logs is showing

   2015-02-16 12:32:06,275 TP-Processor25 ERROR PJoseph 752x192301x1 p764so 211.25.19.194,165.254.226.162 /servicedesk/customer/portal/2/create/54 [feature.customer.request.ServiceDeskWorkflowInitializationManager] Error initializing workflow
   java.lang.NullPointerException
           at com.atlassian.labs.jira.workflow.HipChatPostFunction.execute(HipChatPostFunction.java:75)
           at com.opensymphony.workflow.AbstractWorkflow.executeFunction(AbstractWorkflow.java:1050)
           at com.opensymphony.workflow.AbstractWorkflow.transitionWorkflow(AbstractWorkflow.java:1446)
           at com.opensymphony.workflow.AbstractWorkflow.initialize(AbstractWorkflow.java:615)
           at com.atlassian.servicedesk.internal.feature.customer.request.ServiceDeskWorkflowInitializationManager$$anonfun$initializeWorkflow$1$$anonfun$apply$1$$anonfun$apply$2.apply(ServiceDeskWorkflowInitializationManager.scala:60)
           at com.atlassian.servicedesk.internal.feature.customer.request.ServiceDeskWorkflowInitializationManager$$anonfun$initializeWorkflow$1$$anonfun$apply$1$$anonfun$apply$2.apply(ServiceDeskWorkflowInitializationManager.scala:58)
           at scalaz.$bslash$div$class.map(Either.scala:94)
           at scalaz.$bslash$div$minus.map(Either.scala:283)
           at com.atlassian.servicedesk.internal.feature.customer.request.ServiceDeskWorkflowInitializationManager$$anonfun$initializeWorkflow$1$$anonfun$apply$1.apply(ServiceDeskWorkflowInitializationManager.scala:58)
           at com.atlassian.servicedesk.internal.feature.customer.request.ServiceDeskWorkflowInitializationManager$$anonfun$initializeWorkflow$1$$anonfun$apply$1.apply(ServiceDeskWorkflowInitializationManager.scala:56)
           at scalaz.$bslash$div$class.flatMap(Either.scala:117)
           at scalaz.$bslash$div$minus.flatMap(Either.scala:283)
           at com.atlassian.servicedesk.internal.feature.customer.request.ServiceDeskWorkflowInitializationManager$$anonfun$initializeWorkflow$1.apply(ServiceDeskWorkflowInitializationManager.scala:56)
           at com.atlassian.servicedesk.internal.feature.customer.request.ServiceDeskWorkflowInitializationManager$$anonfun$initializeWorkflow$1.apply(ServiceDeskWorkflowInitializationManager.scala:54)
           at scalaz.$bslash$div$class.flatMap(Either.scala:117)
           at scalaz.$bslash$div$minus.flatMap(Either.scala:283)
           at com.atlassian.servicedesk.internal.feature.customer.request.ServiceDeskWorkflowInitializationManager.initializeWorkflow(ServiceDeskWorkflowInitializationManager.scala:54)
           at com.atlassian.servicedesk.internal.feature.customer.request.ServiceDeskWorkflowInitializationManager.initializeWorkflowForIssue(ServiceDeskWorkflowInitializationManager.scala:35)
           at com.atlassian.servicedesk.internal.feature.customer.request.CustomerRequestManager.com$atlassian$servicedesk$internal$feature$customer$request$CustomerRequestManager$$saveIssueIntoJIRA(CustomerRequestManager.scala:128)
           at com.atlassian.servicedesk.internal.feature.customer.request.CustomerRequestManager$$anonfun$createRequest$2$$anonfun$apply$1$$anonfun$apply$2.apply(CustomerRequestManager.scala:82)
           at com.atlassian.servicedesk.internal.feature.customer.request.CustomerRequestManager$$anonfun$createRequest$2$$anonfun$apply$1$$anonfun$apply$2.apply(CustomerRequestManager.scala:73)
           at scalaz.$bslash$div$class.flatMap(Either.scala:117)
           at scalaz.$bslash$div$minus.flatMap(Either.scala:283)
           at com.atlassian.servicedesk.internal.feature.customer.request.CustomerRequestManager$$anonfun$createRequest$2$$anonfun$apply$1.apply(CustomerRequestManager.scala:73)
           at com.atlassian.servicedesk.internal.feature.customer.request.CustomerRequestManager$$anonfun$createRequest$2$$anonfun$apply$1.apply(CustomerRequestManager.scala:72)
           at scalaz.$bslash$div$class.flatMap(Either.scala:117)
   

Possible Workaround
Check if the username has combination of uppercase and lowercase letters. Try to replace it with all lowercase and check how it goes.