Fix duplicative GetFieldValue/GetVariableValue code

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These methods are largely the same, simplify if possible

Original issue reported on code.google.com by melonhea...@gmail.com on 17 Jun 2012 at 9:22

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Original comment by melonhea...@gmail.com on 4 Jun 2013 at 11:37

• Added labels: Type-Optimization
• Removed labels: Type-Enhancement

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Original comment by Todd.Sch...@gmail.com on 8 Jun 2013 at 4:59

• Added labels: Type-InternalCleanup
• Removed labels: Type-Optimization

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Original comment by melonhea...@gmail.com on 14 Jun 2013 at 11:42

• Added labels: Priority-Low
• Removed labels: Priority-Medium