Adds better error handling to f5 api connections (#35020)

Previously, the failure of the API connection would result
in a stack trace. This patch makes the failure capable of exiting
with fail_json

lib/ansible/module_utils/network/f5/bigip.py

@@ -16,13 +16,16 @@ except ImportError:
 
 try:
     from library.module_utils.network.f5.common import F5BaseClient
+    from library.module_utils.network.f5.common import F5ModuleError
 except ImportError:
     from ansible.module_utils.network.f5.common import F5BaseClient
+    from ansible.module_utils.network.f5.common import F5ModuleError
 
 
 class F5Client(F5BaseClient):
     @property
     def api(self):
+        try:
             result = ManagementRoot(
                 self.params['server'],
                 self.params['user'],
@@ -31,4 +34,9 @@ class F5Client(F5BaseClient):
                 verify=self.params['validate_certs'],
                 token='tmos'
             )
+        except Exception:
+            raise F5ModuleError(
+                'Unable to connect to {0} on port {1}. '
+                'Is "validate_certs" preventing this?'.format(self.params['server'], self.params['server_port'])
+            )
         return result

lib/ansible/module_utils/network/f5/bigiq.py

@@ -14,12 +14,18 @@ try:
 except ImportError:
     HAS_F5SDK = False
 
+try:
+    from library.module_utils.network.f5.common import F5BaseClient
+    from library.module_utils.network.f5.common import F5ModuleError
+except ImportError:
     from ansible.module_utils.network.f5.common import F5BaseClient
+    from ansible.module_utils.network.f5.common import F5ModuleError
 
 
 class F5Client(F5BaseClient):
     @property
     def api(self):
+        try:
             result = ManagementRoot(
                 self.params['server'],
                 self.params['user'],
@@ -28,4 +34,9 @@ class F5Client(F5BaseClient):
                 verify=self.params['validate_certs'],
                 token='local'
             )
+        except Exception:
+            raise F5ModuleError(
+                'Unable to connect to {0} on port {1}. '
+                'Is "validate_certs" preventing this?'.format(self.params['server'], self.params['server_port'])
+            )
         return result

lib/ansible/module_utils/network/f5/iworkflow.py

@@ -14,12 +14,18 @@ try:
 except ImportError:
     HAS_F5SDK = False
 
+try:
+    from library.module_utils.network.f5.common import F5BaseClient
+    from library.module_utils.network.f5.common import F5ModuleError
+except ImportError:
     from ansible.module_utils.network.f5.common import F5BaseClient
+    from ansible.module_utils.network.f5.common import F5ModuleError
 
 
 class F5Client(F5BaseClient):
     @property
     def api(self):
+        try:
             result = ManagementRoot(
                 self.params['server'],
                 self.params['user'],
@@ -28,4 +34,9 @@ class F5Client(F5BaseClient):
                 verify=self.params['validate_certs'],
                 token='local'
             )
+        except Exception:
+            raise F5ModuleError(
+                'Unable to connect to {0} on port {1}. '
+                'Is "validate_certs" preventing this?'.format(self.params['server'], self.params['server_port'])
+            )
         return result