fix exception messages

Author: erikbocks

server/src/main/java/com/cloud/storage/VolumeApiServiceImpl.java

@@ -3201,7 +3201,7 @@ private Volume orchestrateDetachVolumeFromVM(long vmId, long volumeId) {
             try {
                 answer = _agentMgr.send(hostId, cmd);
             } catch (AgentUnavailableException e) {
-                  throw new CloudRuntimeException(String.format("%s. Please contact your system administrator. ", errorMsg));
+                  throw new CloudRuntimeException(String.format("%s. Please contact your system administrator.", errorMsg));
             } catch (Exception e) {
                 throw new CloudRuntimeException(errorMsg + " due to: " + e.getMessage());
             }
@@ -4714,7 +4714,7 @@ private VolumeVO sendAttachVolumeCommand(UserVmVO vm, VolumeVO volumeToAttach, L
                     if (host != null) {
                         volService.revokeAccess(volFactory.getVolume(volumeToAttach.getId()), host, dataStore);
                     }
-                    throw new CloudRuntimeException(String.format("%s. Please, contact your system administrator", errorMsg));
+                    throw new CloudRuntimeException(String.format("%s. Please contact your system administrator.", errorMsg));
                 } catch (Exception e) {
                     if (host != null) {
                         volService.revokeAccess(volFactory.getVolume(volumeToAttach.getId()), host, dataStore);