Add exclusions for joda-time to aws-java-sdk, amazon-kinesis-client

Amazonica itself depends on `joda-time` 2.2, but `aws-java-sdk` and `amazon-kinesis-client` pull it in transitively with a version range, which Leiningen 2.5 rightly detests:

```
: jmglov@alhana; lein install
WARNING!!! version ranges found for:
[com.amazonaws/amazon-kinesis-client "1.1.0"] -> [com.amazonaws/aws-java-sdk "1.7.13"] -> [joda-time "[2.2,)"]
Consider using [com.amazonaws/amazon-kinesis-client "1.1.0" :exclusions [joda-time]].
[com.amazonaws/aws-java-sdk "1.9.7"] -> [com.amazonaws/aws-java-sdk-elasticloadbalancing "1.9.7"] -> [com.amazonaws/aws-java-sdk-core "1.9.7"] -> [joda-time "[2.2,)"]
Consider using [com.amazonaws/aws-java-sdk "1.9.7" :exclusions [joda-time]].

[...]
```

I have considered using the exclusion. ;)