Add mock config for container detection.

tests/data/mock_config_containers/nextflow.config

@@ -0,0 +1,29 @@
+
+
+// example from methylseq 1.0
+params.container = 'nfcore/methylseq:1.0'
+
+// example from methylseq 1.4 [Mercury Rattlesnake]
+process.container = 'nfcore/methylseq:1.4'
+
+process {
+
+    // example from Sarek 2.5
+
+    withName:Snpeff {
+    container = {(params.annotation_cache && params.snpEff_cache) ? 'nfcore/sarek:dev' : "nfcore/sareksnpeff:dev.${params.genome}"}
+    errorStrategy = {task.exitStatus == 143 ? 'retry' : 'ignore'}
+    }
+    withLabel:VEP {
+    container = {(params.annotation_cache && params.vep_cache) ? 'nfcore/sarek:dev' : "nfcore/sarekvep:dev.${params.genome}"}
+    errorStrategy = {task.exitStatus == 143 ? 'retry' : 'ignore'}
+    }
+
+    // example from differentialabundance 1.2.0
+
+    withName: RMARKDOWNNOTEBOOK {
+        conda = "bioconda::r-shinyngs=1.7.1"
+        container = { "${ workflow.containerEngine == 'singularity' && !task.ext.singularity_pull_docker_container ? 'https://depot.galaxyproject.org/singularity/r-shinyngs:1.7.1--r42hdfd78af_1':'quay.io/biocontainers/r-shinyngs:1.7.1--r42hdfd78af_1' }" }
+    }
+
+}