I don't see any reason why glite-lbjp-common-gsoap-plugin-3.2.12-7 can not be built on epel7 ppc64le. This ppc64le version was available on fedora 23 everything packages. I tried to build it on eple7 and it was successfull. https://koji.fedoraproject.org/koji/taskinfo?taskID=17550924 Same comment on aarch64 arch.
Yes, this package and its dependencies are missing in ppc64le and aarch64 repositories. I'm not sure, what's going on. I guess it may be because of missing dependencies at the time? (for example globus-gssapi-gsi built later?)
glite-lbjp-common-gsoap-plugin has been rebuilt due to gsoap update. Also there is running a mass rebuild too, which could fix also the dependencies. Closing.