Remove newlines from top of XML templates

playbooks/roles/hadoop_common/templates/mapred-site.xml.j2

 {% do MAPRED_SITE_DEFAULT_CONFIG.update(mapred_site_config) %}
-
 <?xml version="1.0"?>
 <?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
 

playbooks/roles/hadoop_common/templates/yarn-site.xml.j2

 {% do YARN_SITE_DEFAULT_CONFIG.update(yarn_site_config) %}
-
 <?xml version="1.0"?>
 
 <configuration>

playbooks/roles/hive/templates/hive-site.xml.j2

 {% do HIVE_SITE_DEFAULT_CONFIG.update(HIVE_SITE_EXTRA_CONFIG) %}
-
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <?xml-stylesheet type="text/xsl" href="configuration.xsl"?>