JAVA-9486: Use guava.version defined in the parent pom

spring-security-modules/spring-security-web-digest-auth/pom.xml

@@ -174,7 +174,6 @@
         <!-- Spring -->
         <org.springframework.security.version>4.2.6.RELEASE</org.springframework.security.version>
         <!-- util -->
-        <guava.version>19.0</guava.version>
         <httpcore.version>4.4.5</httpcore.version>
         <httpclient.version>4.5.2</httpclient.version>
         <!-- Maven plugins -->

spring-security-modules/spring-security-web-mvc-custom/pom.xml

@@ -166,8 +166,6 @@
     </build>
 
     <properties>
-        <!-- util -->
-        <guava.version>19.0</guava.version>
         <!-- Maven plugins -->
         <maven-war-plugin.version>3.2.2</maven-war-plugin.version>
         <cargo-maven2-plugin.version>1.6.1</cargo-maven2-plugin.version>

spring-security-modules/spring-security-web-persistent-login/pom.xml

@@ -171,8 +171,6 @@
         <org.springframework.security.version>4.2.6.RELEASE</org.springframework.security.version>
         <!-- persistence -->
         <postgresql.version>9.4.1212</postgresql.version>
-        <!-- util -->
-        <guava.version>19.0</guava.version>
         <!-- Maven plugins -->
         <cargo-maven2-plugin.version>1.6.1</cargo-maven2-plugin.version>
         <spring-boot.version>1.5.10.RELEASE</spring-boot.version>

spring-security-modules/spring-security-web-react/pom.xml

@@ -141,8 +141,6 @@
         </execution> </executions> </plugin> </plugins> </build> </profile> </profiles> -->
 
     <properties>
-        <!-- util -->
-        <guava.version>19.0</guava.version>
         <!-- Maven plugins -->
         <maven-resources-plugin.version>2.7</maven-resources-plugin.version>
         <frontend-maven-plugin.version>1.12.0</frontend-maven-plugin.version>

spring-security-modules/spring-security-web-rest-basic-auth/pom.xml

@@ -235,8 +235,6 @@
         <!-- http -->
         <httpcore.version>4.4.11</httpcore.version>
         <httpclient.version>4.5.8</httpclient.version>
-        <!-- util -->
-        <guava.version>19.0</guava.version>
         <!-- Maven plugins -->
         <cargo-maven2-plugin.version>1.6.1</cargo-maven2-plugin.version>
     </properties>

spring-security-modules/spring-security-web-rest-custom/pom.xml

@@ -164,8 +164,6 @@
     </build>
 
     <properties>
-        <!-- util -->
-        <guava.version>19.0</guava.version>
         <commons-logging.version>1.2</commons-logging.version>
         <!-- Maven plugins -->
         <cargo-maven2-plugin.version>1.6.1</cargo-maven2-plugin.version>

spring-security-modules/spring-security-web-rest/pom.xml

@@ -244,8 +244,6 @@
     <properties>
         <!-- various -->
         <javax.validation.version>1.1.0.Final</javax.validation.version>
-        <!-- util -->
-        <guava.version>26.0-jre</guava.version>
         <!-- testing -->
         <rest-assured.version>2.9.0</rest-assured.version>
         <!-- swagger -->