Salesforce - truncate activity name to 80 characters

[kuzmany]

Please be sure you are submitting this against the staging branch.

Q	A
Bug fix?	Y
New feature?
Automated tests included?
Related user documentation PR URL
Related developer documentation PR URL
Issues addressed (#s or URLs)
BC breaks?
Deprecations?

Description:

Salesforce activities sync https://docs.mautic.org/en/plugins/salesforce stop working If activity name has more like 80 characters. And it happend in many cases for us, for example Page hit.

Because we are not able to extend this limit (hardcoded limit by Salesforce), this PR truncates the activity name.

Steps to reproduce the bug:

Instead wasting time, just code review should be enoght.

1. Setup the Salesforce integration https://docs.mautic.org/en/plugins/salesforce (make sure to set up Mautic's Custom Object in Salesforce or you'll get errors!)
2. In the Salesforce integration settings, make sure to add "Page hit" to the "Events to include in the activity sync":
   
3. Create a landing page in Mautic with a very long name (80+ characters)
4. Make sure a contact has a "Page Hit" event on that page:
   
5. Sync contacts with Salesforce (bin/console mautic:integration:synccontacts -i Salesforce --env=dev)
6. Sync events with Salesforce (php bin/console mautic:integration:pushactivity -i Salesforce --env=dev)
7. Activity is not synced. If you are on dev mode, you can check logs ans see error in log

Steps to test this PR:

1. Load up this PR
2. Repeat all steps and activity should synced

[dennisameling]

Closing and re-opening for Travis

[codecov]

Codecov Report

Merging #8989 into 3.0 will decrease coverage by 0.00%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                3.0    #8989      +/-   ##
============================================
- Coverage     35.24%   35.23%   -0.01%     
- Complexity    27900    27949      +49     
============================================
  Files          1731     1731              
  Lines         96443    96561     +118     
============================================
+ Hits          33987    34020      +33     
- Misses        62456    62541      +85     

Impacted Files	Coverage Δ	Complexity Δ
...pp/bundles/EmailBundle/Form/Type/EmailOpenType.php	0.00% <0.00%> (ø)	7.00% <0.00%> (+2.00%)
...bundles/PluginBundle/Controller/AjaxController.php	0.00% <0.00%> (ø)	82.00% <0.00%> (+34.00%)
app/bundles/PointBundle/Model/PointModel.php	25.44% <0.00%> (+1.17%)	43.00% <0.00%> (ø%)
...dles/EmailBundle/EventListener/PointSubscriber.php	79.59% <0.00%> (+6.86%)	20.00% <0.00%> (+13.00%)

[dennisameling]

NOTE FOR 2nd REVIEWER: code review is enough, the PR works as described

Can confirm the bug (took quite some time to set up the whole integration, good lord 😂):

    {
      "body": [
        {
          "message": "Timeline Name: data value too large: Page hit - https:\/\/mautic3.ddev.site\/test-salesforce-very-long-name-blablabalbaasdfsdfjsdlkfjsdlkfjsdlfkasdfjkhsfkljhsdfljkhsdjklfhsdljkfsjkldfhskjldhflsjkhfjklsdhfkljsdhfkljsdhlfkjhdflksdhflkshflksdhflkdshalkfjhlkdjhfslkhfldk (max length=80)",
          "errorCode": "STRING_TOO_LONG",
          "fields": [
            "Name"
          ]
        }
      ],
      "httpHeaders": {},
      "httpStatusCode": 400,
      "referenceId": "5-00Q2X00001MNkPDUA1"
    }

After applying this PR, the activity is created as expected in Salesforce 🚀

[RCheesley]

LGTM 🎉