working license discovery

...rc/main/java/net/jami/jams/common/updater/AppUpdater.java

.../jams/common/updater/subscription/LicenseInformation.java

...n/src/main/java/net/jami/jams/common/utils/X509Utils.java

.../java/net/jami/jams/common/utils/VersioningUtilsTest.java

...n/java/net/jami/jams/server/licensing/LicenseService.java

...i/jams/server/servlets/api/update/NeedsUpdateServlet.java

.../jams/server/servlets/api/update/SubscriptionServlet.java

jams-server/src/main/resources/oem/ca.crt

...va/net/jami/jams/server/licensing/LicenseServiceTest.java

jams-server/src/test/resources/oem/ca.crt

samples/license.dat

updater/src/main/java/net/jami/jams/updater/JAMSUpdater.java

.../src/main/java/net/jami/jams/updater/UpdateCheckTask.java

...ter/src/main/java/net/jami/jams/updater/UpdateDaemon.java

...src/main/java/net/jami/jams/updater/UpdateDownloader.java

...in/java/net/jami/jams/updater/internal/SFLTrustStore.java