enable Seam Cache provider with EhCache

for enable Seam Cache it's necessary to add Seam namespace in
components.xml

https://jira.nuxeo.com/browse/NXP-9173

and https://github.com/pguillerm/nuxeo-core/commit/74436b6c9d9f3c14e68bc8ee2cf4761ceadf7910 for OSGI bundle implementation