CSPACE-1026 recognizes whitespaces in repeated fields, was already recognizing elsewhere

CSPACE-1026 recognizes whitespaces in repeated fields, was already recognizing elsewhere
added tests that read raw xml from a file without jaxb unmarshaller. added utility methods in AbstractServiceTestImpl for the same.
test: collectionobject tests

M    services/collectionobject/client/src/test/java/org/collectionspace/services/client/test/CollectionObjectServiceTest.java
A    services/collectionobject/client/src/test/resources/test-data/repfield_whitesp3.xml
A    services/collectionobject/client/src/test/resources/test-data/repfield_whitesp4.xml
A    services/collectionobject/client/src/test/resources/test-data/repfield_whitesp1.xml
A    services/collectionobject/client/src/test/resources/test-data/repfield_whitesp2.xml
M    services/common/src/main/java/org/collectionspace/services/common/document/DocumentUtils.java
M    services/pom.xml
M    services/client/src/main/java/org/collectionspace/services/client/test/AbstractServiceTestImpl.java
M    services/client/pom.xml