GDA-5000 Switch to SLF4J 1.7.5
GDA-5000 Switch to SLF4J 1.7.5

(this time for plugins importing >= 1.5.6)
GDA-5000 Switch to SLF4J 1.7.5

(this time for plugins importing org.slf4j with no version constraints)
GDA-5000 Switch uk.ac.diamond.scisoft to Logback 1.1.0