Renaming Node.js capability breaks several Node.js plugin tasks

Renaming Node.js executable label will break several task form Nodejs plugin (eg. npm, Mocha Test Runner). After renaming they'll still point to old label. 

Steps to Reproduce

1. Create a new 'Node.js' Executable
2. Set a tasks from Bamboo Node.js plugin to use this executable
3. Rename this Executable capability at Administration >> Build Resources >> Executable

Expected Results

Tasks created at step 2. points to renamed label

Actual Results

Tasks created at step 2. to old label

Workaround

Try to re-save the task configuration with the correct executable selected