fcrepo-java-client-5.0.0

• Fix naming of sha1 for transmission fixity
• Change encoding of filename Content-disposition field to resolve space encoding issues.
• Avoid setting filename when null, as this will throw an IllegalArgumentException in later versions of spring
• Dependency updates, updates related Fedora version, tracks major version number of fcrepo
  fcrepo-java-client-0.4.0...fcrepo-java-client-5.0.0