GDA-5000 Switch to SLF4J 1.7.5
GDA-5000 / GDA-5769 Update features to use new SLF4J & Logback bundles
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)