[ci skip] Merge PR 23441

Merge PR #23441, commits were: 
 * let valet use only one thread for samtools sort

with `-@ 16` I get `samtools sort: couldn't allocate memory for bam_mem`

seem better anyway with restrictive HPC setups

recipes/valet/meta.yaml

@@ -14,7 +14,7 @@ source:
 
 build:
   noarch: generic
-  number: 2
+  number: 3
 
 requirements:
   run:

recipes/valet/valet.patch

@@ -1,11 +1,20 @@
---- a/src/py/valet.py
-+++ b/src/py/valet.py
-@@ -13,7 +13,7 @@ import sys
+--- src/py/valet.py	2017-08-01 23:04:55.000000000 +0200
++++ src/py/valet.py	2020-07-29 13:56:29.524490605 +0200
+@@ -13,7 +13,7 @@
  import subprocess
  from subprocess import Popen, PIPE
-
+ 
 -BASE_PATH = os.path.dirname(sys.argv[0])[:-len('src/py/')]
 +BASE_PATH = os.path.dirname(os.path.realpath(__file__))[:-len('src/py/')]
  FILE_LIMIT = resource.getrlimit(resource.RLIMIT_NOFILE)[1]
  FNULL = open('/dev/null', 'w')
- COMMANDS_FILE = None
+ COMMANDS_FILE = None
+@@ -524,7 +524,7 @@
+     call_arr = ["samtools", "view", "-F", "0x100", "-bS", sam_output_location]
+     run(call_arr, bam_fp, error_fp)
+
+-    call_arr = ["samtools", "sort", "-@ 16", "-o", sorted_bam_location+".bam", bam_location]
++    call_arr = ["samtools", "sort", "-o", sorted_bam_location+".bam", bam_location]
+     run(call_arr, stderr=FNULL)
+
+     coverage_file_dir = output_dir + "/coverage/"