[fix] Put mysql import in try,catch in case it hasn't been installed

salt/_modules/so.py

@@ -3,36 +3,41 @@
 import logging
 
 def status():
-  return __salt__['cmd.run']('/usr/sbin/so-status')
+    return __salt__['cmd.run']('/usr/sbin/so-status')
 
 
 def mysql_conn(retry):
-  from MySQLdb import _mysql
-  import time
+    log = logging.getLogger(__name__)
 
-  log = logging.getLogger(__name__)
-  mainint = __salt__['pillar.get']('sensor:mainint', __salt__['pillar.get']('manager:mainint'))
-  mainip = __salt__['grains.get']('ip_interfaces').get(mainint)[0]
+    try:
+        from MySQLdb import _mysql
+    except ImportError as e:
+        log.error(e)
+        return False
+    from time import sleep
 
-  mysql_up = False
-  for i in range(0, retry):
-      log.debug(f'Connection attempt {i+1}')
-      try:
-          _mysql.connect(
-              host=mainip,
-              user="root",
-              passwd=__salt__['pillar.get']('secrets:mysql')
-          )
-          mysql_up = True
-          break
-      except _mysql.OperationalError as e:
-          log.debug(e)
-      except Exception as e:
-          log.error(e)
-          break
-      time.sleep(1)
+    mainint = __salt__['pillar.get']('sensor:mainint', __salt__['pillar.get']('manager:mainint'))
+    mainip = __salt__['grains.get']('ip_interfaces').get(mainint)[0]
 
-  if not mysql_up:
-      log.error(f'Could not connect to MySQL server on {mainip} after {retry} attempts.')
+    mysql_up = False
+    for i in range(0, retry):
+        log.debug(f'Connection attempt {i+1}')
+        try:
+            _mysql.connect(
+            host=mainip,
+            user="root",
+            passwd=__salt__['pillar.get']('secrets:mysql')
+            )
+            mysql_up = True
+            break
+        except _mysql.OperationalError as e:
+            log.debug(e)
+        except Exception as e:
+            log.error(e)
+            break
+        sleep(1)
 
-  return mysql_up
+    if not mysql_up:
+        log.error(f'Could not connect to MySQL server on {mainip} after {retry} attempts.')
+
+    return mysql_up