#48 sql mru dataloader doesnt return value associated with key

[Anand Raman]

SqlBeanMapMRUDataLoader has a bug. The loadDatum
method of a mru cache dataloader should return the
value which needs to be cached.

SqlBeanMapMRUDataLoader is returning a map of size 1
which contains the key and value as the contents. This
end result is that irrepective of the bean type specified
in the configuration, a map will cached for the key. This
is wrong and needs to be corrected

[Anand Raman]

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loadDatum() method of SqlBeanMapMRUDataLoader has been
modified to return the value which needs to be cached. The
test case has also been modified to check for correctness.

This bug can be verified and closed.