samples: add presubmit lint check (#216)

* changes without context

        autosynth cannot find the source of changes triggered by earlier changes in this
        repository, or by version upgrades to tools such as linters.

* chore(java_templates): add lint/static analysis presubmit checks for samples

* chore(java_templates): add lint/static analysis presubmit checks for samples

* chore: fix trailing whitespace

Source-Author: Jeff Ching <chingor@google.com>
Source-Date: Mon Aug 17 14:29:16 2020 -0700
Source-Repo: googleapis/synthtool
Source-Sha: c3caf0704f25a0c365f1c315e804a30b87c62a75
Source-Link: googleapis/synthtool@c3caf07

* chore(java_templates): stop running pmd/spotbugs checks for samples

This was creating too much noise. We will revisit with other options and/or tune these checks.

Source-Author: Jeff Ching <chingor@google.com>
Source-Date: Wed Aug 19 12:26:49 2020 -0700
Source-Repo: googleapis/synthtool
Source-Sha: 9602086c6c5b05db77950c7f7495a2a3868f3537
Source-Link: googleapis/synthtool@9602086

* chore: fix line length

Co-authored-by: Jeff Ching <chingor@google.com>

texttospeech/snippets/src/main/java/com/example/texttospeech/SynthesizeTextBeta.java

@@ -35,7 +35,8 @@
 
 /**
  * Google Cloud TextToSpeech API sample application. Example usage: mvn package
- * exec:java-Dexec.mainClass='com.example.texttospeech.SynthesizeTextBeta' -Dexec.args='--text "hello"'
+ * exec:java-Dexec.mainClass='com.example.texttospeech.SynthesizeTextBeta' -Dexec.args='--text
+ * "hello"'
  */
 public class SynthesizeTextBeta {