Adds refactors for more f5 modules (#34824)

The main patch is to remove the traceback generating code. There are
other small fixes that were made in addition to doing that.

* Removed re-def of cleanup_tokens.
* Changed parameter args to be keywords.
* Changed imports to include new module_util locations.
* Imports also include developing (sideband) module_util locations.
* Changed to using F5Client and plain AnsibleModule to prevent tracebacks caused by missing libraries.
* Removed init and update methods from most Parameter classes (optimization) as its now included in module_utils.
* Changed module and module param references to take into account the new self.module arg.
* Minor bug fixes made during this refactor.

test/units/modules/network/f5/fixtures/load_sys_file_ssl_cert_with_issuer_cert.json

@@ -0,0 +1,42 @@
+{
+    "kind": "tm:sys:file:ssl-cert:ssl-certstate",
+    "name": "ocsp.example.com.crt",
+    "partition": "Common",
+    "fullPath": "/Common/ocsp.example.com.crt",
+    "generation": 548,
+    "selfLink": "https://localhost/mgmt/tm/sys/file/ssl-cert/~Common~ocsp.example.com.crt?ver=13.0.0",
+    "certValidationOptions": [
+        "ocsp"
+    ],
+    "certificateKeyCurveName": "none",
+    "certificateKeySize": 4096,
+    "checksum": "SHA1:2113:b84ae5ed7e236b35206b2ff61289df9547d5afa3",
+    "createTime": "2017-10-25T20:56:09Z",
+    "createdBy": "admin",
+    "expirationDate": 1545199767,
+    "expirationString": "Dec 19 06:09:27 2018 GMT",
+    "isBundle": "false",
+    "issuer": "CN=Alice Ltd Intermediate CA,OU=Alice Ltd Certificate Authority,O=Alice Ltd,ST=England,C=GB",
+    "issuerCert": "/Common/intermediate.crt",
+    "issuerCertReference": {
+        "link": "https://localhost/mgmt/tm/sys/file/ssl-cert/~Common~intermediate.crt?ver=13.0.0"
+    },
+    "keyType": "rsa-public",
+    "lastUpdateTime": "2017-10-25T20:56:09Z",
+    "mode": 33188,
+    "revision": 1,
+    "serialNumber": "4096",
+    "size": 2113,
+    "sourcePath": "file:///var/config/rest/downloads/ocsp.example.com.crt",
+    "subject": "CN=ocsp.example.com,OU=Alice Ltd Certificate Authority,O=Alice Ltd,ST=England,C=GB",
+    "updatedBy": "admin",
+    "version": 3,
+    "bundleCertificatesReference": {
+        "link": "https://localhost/mgmt/tm/sys/file/ssl-cert/~Common~ocsp.example.com.crt/bundle-certificates?ver=13.0.0",
+        "isSubcollection": true
+    },
+    "certValidatorsReference": {
+        "link": "https://localhost/mgmt/tm/sys/file/ssl-cert/~Common~ocsp.example.com.crt/cert-validators?ver=13.0.0",
+        "isSubcollection": true
+    }
+}