[File based config] All samplers in dedicated package (#2495)

* InternalRootOffSampler support

* Comment removed

* Move other sampler related classes to subpackage

* Test moved to the right package

Author: robsunday

…ntelemetry/RuleBasedSamplerProvider.java …ry/sampler/RuleBasedSamplerProvider.javacustom/src/main/java/com/splunk/opentelemetry/RuleBasedSamplerProvider.java renamed to custom/src/main/java/com/splunk/opentelemetry/sampler/RuleBasedSamplerProvider.java custom/src/main/java/com/splunk/opentelemetry/RuleBasedSamplerProvider.java renamed to custom/src/main/java/com/splunk/opentelemetry/sampler/RuleBasedSamplerProvider.java

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package com.splunk.opentelemetry;
+package com.splunk.opentelemetry.sampler;
 
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;

…/RuleBasedSamplerProviderConfigTest.java …/RuleBasedSamplerProviderConfigTest.javacustom/src/test/java/com/splunk/opentelemetry/RuleBasedSamplerProviderConfigTest.java renamed to custom/src/test/java/com/splunk/opentelemetry/sampler/RuleBasedSamplerProviderConfigTest.java custom/src/test/java/com/splunk/opentelemetry/RuleBasedSamplerProviderConfigTest.java renamed to custom/src/test/java/com/splunk/opentelemetry/sampler/RuleBasedSamplerProviderConfigTest.java

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package com.splunk.opentelemetry;
+package com.splunk.opentelemetry.sampler;
 
 import static org.assertj.core.api.Assertions.assertThat;