fix site after cms change

workaround for cms site object in defaultProjection

References

Fixes https://github.com/4Science/dspace-angular/issues/56

Description

reload site object after cms changes
site object is reloaded after successful cms request with allProjection containing the metadata in all languages and not the defaultProjection from the PATCH REQUEST containing only metadata in one language.
We are not sure whether the current PATCH operation support params, thus we choose this approach.

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4Science / dspace-angular