Re-add slf4j logging

[ilayaperumalg]

• This PR reverts the changes to update Apache Commons Logging and re-add the previously used slf4j logging

[markpollack]

I think all we need is

		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-api</artifactId>
			<version>${slf4j.version}</version>  <!-- should be removed and managed by spring-boot-dependencies-->
		</dependency>

[markpollack]

made the change to use slf4j directly. Need to look, I think there are some version numbers in some of the slf4j deps, not managed via boot.

merged in 2932769