Attempting to install with missing logstash zipfile breaks subsequent install attempts.

[alexdunncs]

Steps to reproduce:

• Attempt installation with missing logstash
• Copy logstash zipfile to /usr/local/bin/cws/server/
• Attempt reinstallation

Result:
Installation fails, per relevant log output below

Cause:
It appears that subsequent installations do not attempt to make the following directories

• /usr/local/bin/cws/server/apache-tomcat-9.0.33/webapps/camunda
• /usr/local/bin/cws/server/apache-tomcat-9.0.33/webapps/camunta/WEB-INF
• /usr/local/bin/cws/server/apache-tomcat-9.0.33/webapps/engine-rest
• /usr/local/bin/cws/server/apache-tomcat-9.0.33/webapps/engine-rest/WEB-INF

This causes failure of attempts to copy files to these directories.

[user@100 ~]$ /usr/local/bin/cws/configure.sh /tmp/init/configuration.properties

[...]

No issues found with installation configuration.

 Created directory: /usr/local/bin/cws/config/work
 Created directory: /usr/local/bin/cws/config/work/cws-engine
 Created directory: /usr/local/bin/cws/config/work/cws-ui
 Created directory: /usr/local/bin/cws/config/work/tomcat_lib
 Created directory: /usr/local/bin/cws/config/work/tomcat_bin
 Created directory: /usr/local/bin/cws/config/work/tomcat_conf
 Created directory: /usr/local/bin/cws/config/work/camunda_mods
 Created directory: /usr/local/bin/cws/config/work/engine-rest_mods
 Created directory: /usr/local/bin/cws/config/work/elasticsearch
 Created directory: /usr/local/bin/cws/config/work/logging
 Updating server.xml (to point to CWS database)...
 Updating cws-engine/applicationContext.xml...
 Updating cws-engine/cws-engine.properties...
 Updating /usr/local/bin/cws/config/work/tomcat_bin/setenv.sh...
 Updating tomcat/conf/web.xml..
 Updating webapps/camunda/WEB_INF/web.xml..
 Updating webapps/engine-rest/WEB_INF/web.xml..
ERROR: Problem copying /usr/local/bin/cws/config/work/engine-rest_mods/web.xml to /usr/local/bin/cws/server/apache-tomcat-9.0.33/webapps/engine-rest/WEB-INF/web.xml (java.nio.file.NoSuchFileException: /usr/local/bin/cws/server/apache-tomcat-9.0.33/webapps/engine-rest/WEB-INF/web.xml)

[configure.sh] ERROR: Problems detected during CWS Installer, aborting installation.
[user@100 ~]$ mkdir /usr/local/bin/cws/server/apache-tomcat-9.0.33/webapps/engine-rest
[user@100 ~]$ mkdir /usr/local/bin/cws/server/apache-tomcat-9.0.33/webapps/engine-rest/WEB-INF
[user@100 ~]$ /usr/local/bin/cws/configure.sh /tmp/init/configuration.properties

[...]

No issues found with installation configuration.

 Created directory: /usr/local/bin/cws/config/work
 Created directory: /usr/local/bin/cws/config/work/cws-engine
 Created directory: /usr/local/bin/cws/config/work/cws-ui
 Created directory: /usr/local/bin/cws/config/work/tomcat_lib
 Created directory: /usr/local/bin/cws/config/work/tomcat_bin
 Created directory: /usr/local/bin/cws/config/work/tomcat_conf
 Created directory: /usr/local/bin/cws/config/work/camunda_mods
 Created directory: /usr/local/bin/cws/config/work/engine-rest_mods
 Created directory: /usr/local/bin/cws/config/work/elasticsearch
 Created directory: /usr/local/bin/cws/config/work/logging
 Updating server.xml (to point to CWS database)...
 Updating cws-engine/applicationContext.xml...
 Updating cws-engine/cws-engine.properties...
 Updating /usr/local/bin/cws/config/work/tomcat_bin/setenv.sh...
 Updating tomcat/conf/web.xml..
 Updating webapps/camunda/WEB_INF/web.xml..
 Updating webapps/engine-rest/WEB_INF/web.xml..
 Unzipping /usr/local/bin/cws/server/logstash-6.4.2.zip to /usr/local/bin/cws/server
 Unzip of /usr/local/bin/cws/server/logstash-6.4.2.zip to /usr/local/bin/cws/server complete.
 Opening up permissions of file: /usr/local/bin/cws/server/logstash-6.4.2/bin/logstash ...
 Updating cws-logstash.conf...
 Put logstash conf file into place.
END CwsInstaller

---------------------------------------------------------------
Your configuration settings have been saved to:                
  /usr/local/bin/cws/configuration.properties

If no errors were seen above, then you are ready to launch CWS!
  Run:
    ./start_cws.sh

  Then access CWS with a browser at:
     <hostname redacted>
---------------------------------------------------------------

Writing configuration properties to: /usr/local/bin/cws/configuration.properties
[configure.sh] Finished