[MRESOLVER-570] Remove excessive strictness of OSGi dependency metadata

- Mark optional Maven dependencies as optional in OSGi metadata
- Widen version range for org.slf4j.spi package to [1.7,3)

maven-resolver-impl/pom.xml

@@ -108,6 +108,21 @@
         <groupId>org.eclipse.sisu</groupId>
         <artifactId>sisu-maven-plugin</artifactId>
       </plugin>
+      <plugin>
+        <groupId>biz.aQute.bnd</groupId>
+        <artifactId>bnd-maven-plugin</artifactId>
+        <configuration>
+          <bnd><![CDATA[
+            # Mark optional Maven dependencies as optional
+            Import-Package: \
+              org.slf4j.spi;version="[1.7,3)", \
+              javax.inject;resolution:=optional,\
+              com.google.inject*;resolution:=optional, \
+              org.eclipse.sisu*;resolution:=optional, \
+              *
+          ]]></bnd>
+        </configuration>
+      </plugin>
     </plugins>
   </build>
 </project>

pom.xml

@@ -609,6 +609,10 @@
               Bundle-SymbolicName: ${Bundle-SymbolicName}
               # Export packages not containing the substring 'internal'
               -exportcontents: ${removeall;${packages};${packages;NAMED;*internal*}}
+              # Mark optional Maven dependencies as optional
+              Import-Package: \
+                javax.inject*;resolution:=optional, \
+                *
               # Reproducible build
               -noextraheaders: true
             ]]></bnd>