Various bigiq fixes (#44487)

Fixes usage of the RestClient class. Documentation fixes. Removal
of dependency code.

test/units/modules/network/f5/test_bigiq_regkey_license.py

@@ -100,7 +100,7 @@ class TestManager(unittest.TestCase):
             license_key='XXXX-XXXX-XXXX-XXXX-XXXX',
             accept_eula=True,
             description='this is a description',
-            password='passsword',
+            password='password',
             server='localhost',
             user='admin'
         ))

test/units/modules/network/f5/test_bigiq_regkey_license_assignment.py

@@ -112,7 +112,7 @@ class TestManager(unittest.TestCase):
             device_password='secret',
             managed='no',
             state='present',
-            password='passsword',
+            password='password',
             server='localhost',
             user='admin'
         ))

test/units/modules/network/f5/test_bigiq_utility_license.py

@@ -86,7 +86,7 @@ class TestManager(unittest.TestCase):
         set_module_args(dict(
             license_key='XXXX-XXXX-XXXX-XXXX-XXXX',
             accept_eula=True,
-            password='passsword',
+            password='password',
             server='localhost',
             user='admin'
         ))