Fix invalid_grant on refresh token request in context of NEV

2021-04-27 16:43:29,204 ERROR [http-nio-8080-exec-1038] [com.arondor.viewer.common.documentservice.RemoteActionExecutor] An error occured while executing a remote actionTry 4 -  from ClientDocumentService
org.nuxeo.client.spi.NuxeoClientRemoteException: HTTP/400: invalid_grant
	at org.nuxeo.client.spi.auth.oauth2.OAuth2Client.executeRequest(OAuth2Client.java:117)
	at org.nuxeo.client.spi.auth.oauth2.OAuth2Client.refreshToken(OAuth2Client.java:98)
	at com.nuxeo.ecm.arender.client.NuxeoClientFactoryImpl$1.refreshToken(NuxeoClientFactoryImpl.java:110)
	at org.nuxeo.client.spi.auth.OAuth2AuthInterceptor.intercept(OAuth2AuthInterceptor.java:52)
	at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
	at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
	at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:254)
	at okhttp3.RealCall.execute(RealCall.java:92)
	at retrofit2.OkHttpCall.execute(OkHttpCall.java:186)
	at org.nuxeo.client.NuxeoClient.fetchResponse(NuxeoClient.java:274)
	at org.nuxeo.client.objects.AbstractConnectable.fetchResponse(AbstractConnectable.java:65)
	at org.nuxeo.client.objects.Document$AbstractAdapter.get(Document.java:972)
	at org.nuxeo.client.objects.Document$AbstractAdapter.get(Document.java:948)
	at com.nuxeo.ecm.arender.connector.NuxeoARenderAdapter.download(NuxeoARenderAdapter.java:31)
	at com.nuxeo.ecm.arender.client.NuxeoClientFacade.streamBlob(NuxeoClientFacade.java:158)
	at com.nuxeo.ecm.arender.connector.BlobDocumentAccessor.getInputStream(BlobDocumentAccessor.java:76)