Added `PluginAwareInterface` and marked `EventsCapableInterface` as deprecated

[weierophinney]

Since the StorageFactory only checks for the EventsCapableInterface, it would result in a Call to undefined method WhateverStorage::hasPlugin.

Therefore, I would like to introduce that PluginAwareInterface for ZF3 and until then, I would like to mark the EventsCapableInterface usage as deprecated and provide this backport request.

---

Originally posted by @boesing at zendframework/zend-cache#177

[weierophinney]

@boesing
The target version is 2.9?

---

Originally posted by @froschdesign at zendframework/zend-cache#177 (comment)

[weierophinney]

@froschdesign I'm not sure since I did not got into those release processes already. If thats a change for 2.8, I could change the target branch to master

---

Originally posted by @boesing at zendframework/zend-cache#177 (comment)

[weierophinney]

No no, the develop branch is correct!

I looked at the code and thought that it is for version 3 and then I saw the deprecation info. A deprecation goes in the next minor release.

---

Originally posted by @froschdesign at zendframework/zend-cache#177 (comment)

[weierophinney]

I guess this PR is ready to merge now @froschdesign, would be great if you drop the WIP label. Thanks.

---

Originally posted by @boesing at zendframework/zend-cache#177 (comment)

[weierophinney]

I really could need this PR in my latest project boesing/zend-cache-redis-cluster as I want to work with that PluginCapableInterface::getPluginRegistry to determine search for the serializer plugin.

I guess anything is on hold until we have more news about laminas?

---

Originally posted by @boesing at zendframework/zend-cache#177 (comment)

[boesing]

Closed with #21