[yang] extend ConfigMgmt constructor to pass YANG options (#2118)

- What I did
Pass YANG attribute that allow do not automatically search for schemas in current working directory, which is by default searched automatically (despite not recursively).

- How I did it
extend ConfigMgmt constructor

- How to verify it
Create some invalid link on switch :
ln -s /usr/abc xxx
run spm list
--> There should not be these messages:

config/config_mgmt.py

@@ -35,7 +35,7 @@ class ConfigMgmt():
     to verify config for the commands which are capable of change in config DB.
     '''
 
-    def __init__(self, source="configDB", debug=False, allowTablesWithoutYang=True):
+    def __init__(self, source="configDB", debug=False, allowTablesWithoutYang=True, sonicYangOptions=0):
         '''
         Initialise the class, --read the config, --load in data tree.
 
@@ -53,6 +53,7 @@ def __init__(self, source="configDB", debug=False, allowTablesWithoutYang=True):
             self.configdbJsonOut = None
             self.source = source
             self.allowTablesWithoutYang = allowTablesWithoutYang
+            self.sonicYangOptions = sonicYangOptions
 
             # logging vars
             self.SYSLOG_IDENTIFIER = "ConfigMgmt"
@@ -67,7 +68,7 @@ def __init__(self, source="configDB", debug=False, allowTablesWithoutYang=True):
         return
 
     def __init_sonic_yang(self):
-        self.sy = sonic_yang.SonicYang(YANG_DIR, debug=self.DEBUG)
+        self.sy = sonic_yang.SonicYang(YANG_DIR, debug=self.DEBUG, sonic_yang_options=self.sonicYangOptions)
         # load yang models
         self.sy.loadYangModel()
         # load jIn from config DB or from config DB json file.
@@ -280,7 +281,7 @@ def get_module_name(yang_module_str):
         """
 
         # Instantiate new context since parse_module_mem() loads the module into context.
-        sy = sonic_yang.SonicYang(YANG_DIR)
+        sy = sonic_yang.SonicYang(YANG_DIR, sonic_yang_options=self.sonicYangOptions)
         module = sy.ctx.parse_module_mem(yang_module_str, ly.LYS_IN_YANG)
         return module.name()
 

sonic_package_manager/manager.py

@@ -5,6 +5,7 @@
 import os
 import pkgutil
 import tempfile
+import yang as ly
 from inspect import signature
 from typing import Any, Iterable, List, Callable, Dict, Optional
 
@@ -1002,7 +1003,7 @@ def get_manager() -> 'PackageManager':
         docker_api = DockerApi(docker.from_env(), ProgressManager())
         registry_resolver = RegistryResolver()
         metadata_resolver = MetadataResolver(docker_api, registry_resolver)
-        cfg_mgmt = config_mgmt.ConfigMgmt(source=INIT_CFG_JSON)
+        cfg_mgmt = config_mgmt.ConfigMgmt(source=INIT_CFG_JSON, sonicYangOptions=ly.LY_CTX_DISABLE_SEARCHDIR_CWD)
         cli_generator = CliGenerator(log)
         feature_registry = FeatureRegistry(SonicDB)
         service_creator = ServiceCreator(feature_registry,