Support slf4j2 in OSGi

[msqr]

The generated OSGi package import metadata limits slf4j to a version range [1.7,2) however Ehcache is compatible with slf4j 2. Could the version range be loosed to support v2, for example by allowing anything >= 1.7 with a version range of just 1.7? For example:

instruction Constants.IMPORT_PACKAGE, 'javax.cache.*;resolution:=optional, jdk.internal.misc;resolution:=optional, !javax.annotation, !sun.misc, jakarta.xml.bind*;version="3", org.slf4j.*;version="1.7", *'

Note I have shown a proposed additional change re #3265.