mark org.apache.commons.logging.* as an optional osgi dependency

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1881825 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/osgi/pom.xml b/osgi/pom.xml
index ea41afa..483db26 100644
--- a/osgi/pom.xml
+++ b/osgi/pom.xml
@@ -80,6 +80,7 @@
                             org.apache.xml.resolver.*;resolution:=optional,
                             org.apache.xml.security.*;resolution:=optional,
                             org.bouncycastle.*;resolution:=optional,
+                            org.apache.commons.logging.*;resolution:=optional,
                             !com.github.luben.zstd.*,
                             !org.tukaani.xz.*,
                             !org.brotli.dec.*,