DOCKERFILE cleanup and minor sctipt change (#1892)

Signed-off-by: DEBOJYOTI GHOSH <debojyoti.ghosh@oracle.com>

Author: deboghos

OracleWebCenterContent/dockerfiles/12.2.1.4/Dockerfile

@@ -45,7 +45,7 @@ ENV CONTENT_JAR=fmw_12.2.1.4.0_wccontent.jar \
 # Install packages and adjust file permissions
 # -------------------------------------------------------------
 RUN mkdir -p /u01 && \
-    yum install -y libaio tar procps hostname zip unzip && \
+    yum install -y hostname && \
     rm -rf /var/cache/yum && \
     mkdir -p $VOLUME_DIR && \
     mkdir -p /u01/oracle/container-scripts && \

OracleWebCenterContent/dockerfiles/12.2.1.4/container-scripts/configureOrStartWebCenterContent.sh

@@ -68,9 +68,9 @@ hostalias=`echo $hostname | sed  's/[.]//g'`
 truncatedhostname=${hostalias}
 
 
-if [ ${#truncatedhostname} -gt "20" ]
+if [ ${#truncatedhostname} -ge "15" ]
 then
-    truncatedhostname=${truncatedhostname:0:10}
+    truncatedhostname=${truncatedhostname:0:14}
 fi
 
 if [ -f /$vol_name/oracle//oracle_common/lib/ons.jar ]