Adds comments to the mepty constructor for information exchange classes.
The default constructor in all the classes is only coded thath it's
possible to map these object with JSON.

Change-Id: I695f0acca95c8f14183e64a4aa3cf5d86eb07ed1
Signed-off-by: Peter Merkert <p.merkert@sap.com>
Added a simple information output to an error case.

Change-Id: Iae65ffddf9c12f5ee9175b97420f1d659ffc39c5
Signed-off-by: Peter Merkert <p.merkert@sap.com>
Turned a RESTful URI maüpping around (mec/set/med/blank/ -->
mec/med/set/blank/)

Change-Id: I42280cfb644ec901153598b7d4aaeffccb28e4a6
Signed-off-by: Peter Merkert <p.merkert@sap.com>
Added more services to the MeasurementControllerService.

Added: URL Validation,
       set+get MED from MEC,
       set+get MED from blank newly created MEC
       

Change-Id: I5824c89de41887c35acbc011a2df11e40a53ddf2
Signed-off-by: Peter Merkert <p.merkert@sap.com>
Added test for the MEC-Service. For these tests I needed to add a custom
JSon ObjectMapper configuration.

This class is used to customize the used Jackson Json converter. E.g.
say that the conversation must not fail when there are unknown
properties.
The example happened, whe trying to map the ParameterNamespace.java from
SoPeCo Core, because a method called "getFullName" exists, but not the
field "fullName". The Jackson Json parsing provider throw an error and
shut down. To prevent this behaviour we need to tell Jackson to ingore
these "not mappable properties".

Change-Id: I93b9535948f0f92702fe83ada5d5d92a11ff4cff
Signed-off-by: Peter Merkert <p.merkert@sap.com>