Rename measure to measurement; move refining.measures to

.../java/org/orekit/rugged/adjustment/AdjustmentContext.java

...t/rugged/adjustment/GroundOptimizationProblemBuilder.java

...ed/adjustment/InterSensorsOptimizationProblemBuilder.java

.../orekit/rugged/adjustment/OptimizationProblemBuilder.java

...java/org/orekit/rugged/adjustment/measurements/Noise.java

...rg/orekit/rugged/adjustment/measurements/Observables.java

.../orekit/rugged/adjustment/measurements/SensorMapping.java

...rugged/adjustment/measurements/SensorToGroundMapping.java

...rugged/adjustment/measurements/SensorToSensorMapping.java

src/test/java/org/orekit/rugged/api/RuggedTest.java

src/tutorials/java/RefiningPleiades/GroundRefining.java

src/tutorials/java/RefiningPleiades/InterRefining.java

src/tutorials/java/RefiningPleiades/Refining.java

...finingPleiades/generators/GroundMeasurementGenerator.java

...efiningPleiades/generators/InterMeasurementGenerator.java

...utorials/java/RefiningPleiades/generators/Measurable.java

...ls/java/RefiningPleiades/metrics/LocalisationMetrics.java