Saving FModel with Float or Double constant fails

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What steps will reproduce the problem?
1. Create an FModel that contains a Float and/or Double constant
2. Save the FModel using FrancaPersistenceManager.saveModel()

What is the expected output? What do you see instead?
Expected: The model should be saved to the specified URI.
Actual: Saving fails with an XtextSerializationException

What version of the product are you using? On what operating system?
Franca: 0.9.0
OS: Linux (Fedora 17)

Please provide any additional information below.
- I have attached a small test case that reproduces this error.
- Interestingly, even loading a .fidl file that I created with the Franca IDL 
editor and saving it afterwards with the FrancaPersistenceManager fails.

Original issue reported on code.google.com by klaus....@intel.com on 13 Jun 2014 at 1:59

Attachments:

• ConstantTest.fidl
• FrancaIDLGuiceTestRunner.java
• ConstantTest.java

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Original comment by klaus.birken@gmail.com on 8 Jul 2014 at 12:54

• Changed state: Accepted
• Added labels: Milestone-v0.9.1

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Original comment by klaus.birken@gmail.com on 4 Nov 2014 at 8:59

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Implemented with commit 930a260 on develop.

Original comment by klaus.birken@gmail.com on 8 Dec 2014 at 10:45

• Changed state: ToBeIntegrated

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Original comment by klaus.birken@gmail.com on 19 Dec 2014 at 2:35

• Changed state: Fixed

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Original comment by klaus.birken@gmail.com on 25 Jan 2015 at 11:20

• Added labels: Component-Framework