[QC-585] Pass Monitoring URL to Mergers

[knopers8]

After AliceO2Group/AliceO2#6227

[knopers8]

yes, the error is legit

[knopers8]

I noticed that the multinode test failed and it seems it was due to a very long time it took DPL to initialize the first workflow:

[INFO] Starting internal-dpl-injected-dummy-sink on pid 57107
[INFO] Redeployment of configuration done.
2021-06-23 06:12:40.741945     QC infologger initialized
2021-06-23 06:12:40.742020     Using config file 'json:///mnt/mesos/sandbox/sandbox/qualitycontrol-dataflow/sw/BUILD/325bed0671102d9b7d32815c603c8d16dce02092/QualityControl/tests/multinode-test.json'
2021-06-23 06:12:40.742120     Creating a local QC topology.
2021-06-23 06:12:40.742146     Generating Data Sampling
2021-06-23 06:12:40.743594     QC version 1.19.0
2021-06-23 06:12:40.744045     policyName : sampling1
[INFO] Initialising O2 Data Processing Layer. Driver PID: 56674.
[INFO] O2 Data Processing Layer initialised. We brake for nobody.
[INFO] Redeployment of configuration asked.
[INFO] Starting internal-dpl-clock on pid 57125
[INFO] Starting producer-0 on pid 57126
[INFO] Starting producer-1 on pid 57127
[INFO] Starting Dispatcher on pid 57128
[INFO] Starting QC-TASK-RUNNER-MultiNodeLocalTest59732 on pid 57129
[INFO] Starting sampling2-proxy on pid 57131
[INFO] Starting MultiNodeLocalTest59732-proxy-1 on pid 57132
[INFO] Redeployment of configuration done.
[57097:internal-dpl-clock]: 2021-06-23 06:12:55.999214     QC infologger initialized
[57097:internal-dpl-clock]: 2021-06-23 06:12:55.999285     Using config file 'json:///mnt/mesos/sandbox/sandbox/qualitycontrol-dataflow/sw/BUILD/325bed0671102d9b7d32815c603c8d16dce02092/QualityControl/tests/multinode-test.json'
[57097:internal-dpl-clock]: 2021-06-23 06:12:55.999381     Creating a remote QC topology.

I will increase the timeouts.

[knopers8]

The other two tests are passing here, so this PR should be safe, merging.