Comand to start infra-solr manually

@Kureikana 

Can you try this

Suppose you start your infra solr process as "infra-solr" user then try the following command.
Non Kerberos Env:

# su - infra-solr
# source /etc/ambari-infra-solr/conf/infra-solr-env.sh

# /usr/lib/ambari-infra-solr/bin/solr start -cloud -noprompt -s /var/lib/ambari-infra-solr/data 2>&1

Kerberos Env:

# su - infra-solr
# kinit -kt /etc/security/keytabs/ambari-infra-solr.service.keytab   <AMBARI_INFRA_PRINCIPAL>

# source /etc/ambari-infra-solr/conf/infra-solr-env.sh

# /usr/lib/ambari-infra-solr/bin/solr start -cloud -noprompt -s /var/lib/ambari-infra-solr/data -Dsolr.kerberos.name.rules='DEFAULT' 2>&1

.