Fix error in provisioning Docker slaves on QA2

SEVERE [Computer.threadPoolForRemoting [#15174]] com.nirima.jenkins.plugins.docker.DockerCloud$1.run Error in provisioning; template='DockerTemplate{configVersion=2, connector=io.jenkins.docker.connector.DockerComputerJNLPConnector@57b72ed9, instanceCap=10, mode=EXCLUSIVE, retentionStrategy=com.nirima.jenkins.plugins.docker.strategy.DockerOnceRetentionStrategy@1d027218, dockerTemplateBase=DockerTemplateBase{image='dockerpriv.nuxeo.com:443/nuxeo/jenkins-slave-8.10-jnlp', hostname='', dnsHosts=[], network='', bindPorts='', bindAllPorts=false, tty=false, macAddress='null'}, removeVolumes=true, pullStrategy=PULL_ALWAYS, nodeProperties=[hudson.plugins.ws_cleanup.DisableDeferredWipeoutNodeProperty@7a214e61], disabled=BySystem,0 ms,4 min 59 sec,Template provisioning failed.}' for cloud='Docker-slave'
 com.github.dockerjava.api.exception.InternalServerErrorException: Error response from daemon: OCI runtime create failed: container_linux.go:345: starting container process caused "exec: \"-url\": executable file not found in $PATH": unknown        at com.github.dockerjava.netty.handler.HttpResponseHandler.channelRead0(HttpResponseHandler.java:109)
        at com.github.dockerjava.netty.handler.HttpResponseHandler.channelRead0(HttpResponseHandler.java:33)
        at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
        at io.netty.handler.logging.LoggingHandler.channelRead(LoggingHandler.java:241)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
        at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:438)
        at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:310)
        at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:284)
        at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:253)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
        at io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:287)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
        at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1334)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
        at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:926)
        at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:134)
        at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:644)
        at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:579)
        at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:496)
        at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:458)
        at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:858)
        at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:138)
        at java.lang.Thread.run(Thread.java:748)